I feel like all "non-inner-circle people" here are taken for a laugh. OpenAI and these security companies sat on this for 2 months, decided for themselves who gets access to an early fix, and then leave the rest out to dry while they failed to properly contain it.
The official interim fix for php8.5 [1] could have been published 24h ago, or even 2 weeks ago, without revealing any security details. Specifically once the POC came online. Would have been significantly more useful than these polished blogs.
Perhaps I'm missing something here, but the costs (dev/sre time, missed sales, potential data leaks and hacks) of the way that this was handled is significant.
>OpenAI and these security companies sat on this for 2 months
these security companies reported it 2 months ago. it took a month for the php security team to acknowledge it and another month for the php team to develop & release the patch.
if you're going to be upset at anyone it should not be the reporters.
>The official interim fix for php8.5 [1] could have been published 24h ago, or even 2 weeks ago, without revealing any security details.
publishing the fix = publishing the security details.
This really sounds to me like "they filled out some webform" or "sent an email to security@php that read like any of the ten billion we found vulnerability in your code please send money emails they get.
If I had details on a RCE like this I'd report it but if I got no response for a WEEK I'd be trying other venues.
I imagine more details will come out over the coming days, but it’s not uncommon for severity to be under-estimated in the beginning; and then “oh shit” as you dig deeper.
We don’t know when it went from a “memory safety issue” to “php2shell/RCE”.
Calif’s report is a little light on timelines, but reading between the lines, it seems they took a while to turn this into an actually exploitable vulnerability.
Finally, at least pre-LLM (and maybe a bit outdated now), responsible security disclosure norms is that you usually do wait for vendor (up to 90d) if there’s no signs of active exploitation. Even if it’s a RCE. Actually, especially if it’s a RCE.
The last thing you wanna do is go pinging random non-security PHP contributors or maintainers and have it leak with zero patch. That is truly the worst outcome.
Yes, this is bad, but also, it’s apparently been bad for decades; and it could’ve been much worse.
According to this post, one of the researchers was a former PHP security lead who already knew about the bug since 2004. So I'd assume they would be taken as credible by the current team https://calif.io/php2shell/
As I mention elsewhere (https://bugs.php.net/bug.php?id=78876) I'm very confused. Looking at the PHP bug tracker the specific bugs were fixed. So my best guess is that the LLM was able to find alternative variants that still worked? But then the report makes less sense.
Assuming that it could have been spotted in their inbox, amongst a probable flooded of LLM slop like a number of security mailing lists for open source projects that I know of. We've all seen the impact on open source github issues, hackerone etc. The same is happening to standard email disclosure paths.
>This really sounds to me like "they filled out some webform" or "sent an email to security@php that read like any of the ten billion we found vulnerability in your code please send money emails
i highly doubt it. these are pretty big names in the security sector who have plenty of experience reporting high severity vulns.
If you provide forewarning, system administrators around the world in various time zones can get ready to update at the same hour the fix is released, which is very important. Being hours late is not acceptable for a vulnerability like this.
So if Wiz produced their own patch to PHP, and Calif produced their own (slightly different) patch, and OpenAI produced their own, which version should I use, as a user of PHP? Should I manually merge them? Is Calif's better than Wiz's? Is OpenAI's better than Calif's? Are they complementary?
And that's not a bad thing. If it was, the the logical conclusion would be to never publish the fix and don't preemptively patch before active exploitation.
Say I release a fix. I'm some rando but I go out to the world and say I fixed an issue with php. Use my version instead! Not telling you what I fixed, it's a secret, just trust me.
It will take, with LLM help, attackers a couple hours, tops, to reverse engineer my fix into active exploitation. Meanwhile, I'm some rando so no one's even heard of me, people who do hear don't automatically trust me to install my fix, so very few people have my fix. Meanwhile, the exploit is out there thanks to me and people are getting their sites hacked thanks to me.
How is what you are describing any different than what happened today? Except the vulnerabilities were also explained. You can say that sites are getting hacked right now due to them releasing the security update.
>I'm some rando so no one's even heard of me
Why do think people need to have heard of you. If you are reporting this issue directly to distro maintainers, security companies, hosting companies, etc first you can help use their names as part of the marketing push to raise awareness.
You're confusing PHP the product with PHP the codebase. The former is what is the only relevant part in the security world, where a product is synonymous with its vendor (even FOSS).
The PHP maintainers have generated a certain amount of goodwill over their long service, which leads downstream consumers to trust their releases over every other packaging of "PHP the open source codebase".
Nonetheless, there are countless forks of that codebase, and there are other releases than the ones made by the PHP maintainers. Any particular downstream could switch to another source of releases if presented with a compelling enough reason.
What's the other choice? OpenAI et al could have developed a patch (for all we know they did) but you need the PHP team's participation to get it out. The alternative would be to fork the project and put up a forked release with the fix, which would have been incredibly disruptive.
I'm glad they didn't do anything disruptive, then. Like wind the world's CIOs up into a frenzy of FUD and bring thousands of servers down in a coordinated panic attack synchronised to the minute.
Imagine if they had just patched the code and rolled it out with an advisory?! Oh my GOD! Won't someone think of Sam Altman and his huge pile of debt?!
Pre AI, silently publishing a fix to a security vulnerability was considered bad practice.
Post AI, Its efficiency pre announcing the exploit to bad actors until the official disclosure.
You can just watch the diff log of every open source project with a small local model, and look for anything that touches buffers, function pointers, or shell integration.
It could be an hour between release of a fix before the exploit starts attacking servers.
Guess what also could happen within an hour? A coordinated Internet wide panic that shuts down all vulnerable servers.
---
We actually have a recent example. OpenAI hack.
An undisclosed vulnerability fix to a image formal lib; packages into debian 12 running in a docker, used by imagemagic, used by discourse running OpenAIs user forum.
To handle the official solution and drive long term changes to reduce similar security bugs from happening again. The current PHP security team does not seem capable to promptly release a fix, so having a community fix first seems preferable.
Mitigating a bug and developing a proper solution that is maintainable long term and supports future changes being made to the software take different amounts of time to develop.
One concern with the current environment is that as soon as a release comes out for such an important open source project, people will immediately point bots at the release to look for changes that might be related to existing security issues. This means that putting out a quick out-of-band release is guaranteed to result in people racing to exploit the problem before many even know there is an update out.
Whether keeping the update quiet and including it in the next normal release, where there are more trees obscuring the wood that is the security concern, and announcing the bug a short time later once anyone using distro updates or otherwise keeping on top of things have updated, would be safer overall than what has happened today is up for debate. I can think of arguments in both directions.
--------
[1] which does have a slight whiff of AI marketing about it - would a human-found issue, without the option of a big AI company to claim some credit, have been handled differently?
This is not a "concern", this is literally what happens. Even prior to AI vulnerability scanning, release notes and diffs for any normal release or security patch of popular software were analysed and used to develop exploits, which could then be applied against non-upgraded instances. Nowadays, AI is doing this en masse and automatically producing exploits. And, as has been demonstrated, nowadays even the rumour of a major security bug is enough for people to find it, as people will immediately burn huge volumes of tokens looking for it.
Nor can you just keep it quiet and smuggle it out in a regular release as you suggest. For one thing, changes in important software are be linked to commits and have pull requests, reviews, etc. Changes without these will immediately raise suspicion, as either a malicious change snuck into a release, or as a "quiet" fix to a major vulnerability, completely undermining the purpose of keeping it quiet in the first place. Moreover, major vulnerability fixes cannot be "quiet", because the whole point is to get as many people as possible to upgrade as quickly as possible. If PHP (or whoever) push out a release containing a major security fix, but don't make this clear, then many people will be in no rush to upgrade, and will get pwned.
> This is not a "concern", this is literally what happens.
Sorry, I should have been specific: the concern is that this will happen faster than even the more fastidious admins (or daily or even hourly automated checks) will spot and apply updates.
> nowadays even the rumour
I think a lot fewer people would have paid attention at all without the rumour. Some ne'er-do-wells might have scanned a larger update for security issues otherwise, but I suspect most of those spending tokens on PHP this week would not have bothered had there just been a standard maintenance release that may or may not have included changes for a security issue that may (but probably not) have been so globally significant.
That is, at least in part, why the question of how to manage the release of updates like this is not a settled debate.
> then many people will be in no rush to upgrade, and will get pwned.
The worst case that we may be heading towards is that for any services on public facing infrastructure we might have to automatically apply updates with little or no time to verify, just to try be ahead of the ne'er-do-wells, with even superficial updates not mentioning the changes until a short time after to avoid giving clues to those who will scan for security issues if any such is mentioned (or nothing is mentioned - saying nothing about a security-only update only works if you say nothing about all updates, and you don't want to hold off on security-only updates on a slow moving project that might not have a non-security patch for quite some time).
It's not possible to publish a security patch for an open source software report without revealing security details anymore (and as of the past couple weeks I would not count on being able to do that for closed source binaries either). The moment you push publish everyone knows previous versions are compromised
You can't do secret releases, people will figure out what you added or changed.
But they could have accelerated the patch release once the embargo was broken and rumors of a PoC started going around. There was no need to wait 12+h today until the release.
Maybe the NSA ‘requested’ some time to use the exploit on some high value targets.
Sure, it’s PHP, but plenty of companies or organisations might have some PHP running somewhere; and once you’re in, lateral movement becomes a lot easier.
The NSA does not need to "request" time to use an n-day vuln. They have more 0-days than you can imagine.
They literally employ full-time Vulnerability Researchers doing nothing but 0-day discovery and PoC creation 24/7 to add to their horde. Plus contracting with the MIC for their full-time VRs for the occasional project.
Exactly. Something like this is often the NSA realizing one of their pet vulns is being exploited in the wild by someone “not them” and so they burn it.
> Over the past two months, we led a coalition of maintainers, researchers, and security providers to address critical vulnerabilities in PHP, an open-source programming language used to run websites and web applications.
And they botched this as someone talked. To me this looks like they used this for a PR stunt and aimed for an RCE.
If I understood the timeline correctly, there was an announcement made somewhere that an RCE would be announce w/ a patch, and the internet just scanned the entire codebase, they really fumbled this for the sake of having a PR post for OpenAI.
On the other hand, I don't mind AI companies doing this sort of thing, I'm sure a lot of our internet infrastructure could benefit from these sorts of fixes and changes.
> And they botched this as someone talked. To me this looks like they used this for a PR stunt and aimed for an RCE.
This is a pretty constant theme in the infosec industry. The idea is that you want to do the "responsible" thing and let all the major, multi-billion-dollar companies patch first, so you form a secret club. But then, you share a very juicy, gossip-worthy thing with hundreds of people and ask them to sit on it for weeks. And guess what happens: they don't. Having worked for a big tech company, I've been involved on a couple of processes of this sort, and they all suffered leaks.
And rest assured, we'll learn nothing and try the same thing again next month or next year. Because what's the alternative? If you 0-day everyone, you get more hate mail, not less. It's all of sudden about you, not the vulnerable code. Microsoft or Cloudflare calls you irresponsible when asked for a PR statement, industry bloggers bully you, etc.
Debian has, though only for current stable (updates for oldstable and oldoldstable apparently about to drop) which might imply they had no advanced access to the update so could not pre-test and release immediately upon the coordinated announcement.
Not true. I was able to `aptitude update` and `aptitude full-upgrade` before 10:00 AM EST (9:50 AM) and received the new php8.* packages and upgraded fine.
Still no update for ubuntu 20.04 which has support via ESM, even though the patch is available for php 7.4. There are a lot of people using older servers which still have ESM support.
PHP 8.5.4-0ubuntu1.5 (the fixed version for Ubuntu 26.04) has been downloadable for me via apt from security.ubuntu.com for about 30 minutes. Perhaps check to see that you're not using a different mirror?
This isn't a terribly uncommon method of 'discovery'. In maths and sciences there have been tons of papers that have highlighted something new but were never really connected to anything else and then largely forgotten. Later they are picked up by someone else and connected to a much bigger whole.
The bug you posted was patched and fixed 6 years ago, and none of the other bugs in the audit showcase that issue. Are you sure these are the right links?
So how does the exploit actually work? The best I can find is that they manage to use the corrupted generic decoder state to write a single pointer and associated PHP type information anywhere in memory, then immediately claim "this is RCE". Is that enough? From my (admittedly limited) understanding of such things, after writing code to the target memory you also need to be able to start actually running it. Or do they overwrite the PHP code (which is somewhere in memory) and then let the interpreter do its thing?
But it was withdrawn; now it says that it (CVE-2026-109618) is not an RCE and not even a CVE, apparently an addref call prevents the use-after-free. CVE-2026-109619 is still a memory safe bug, but they have no RCE for that one
One of the most common PHP based applications out there, therefore a good comms channel (via their forums and any mailing lists, both public and for people who have managed instances with them or are otherwise paying for support contracts) to make sure people are aware of the need to update. That would make the company one worth keeping in the loop, if only in one direction, I would have thought?
Fair point. I thought that had died down, though for some years I've not had reason to keep particularly informed about the state of WP so I could be missing a lot of hot gossip.
I wonder how early the domain was registered and when the first certificate was issued for it, whether you could’ve had advanced notice of this by watching the DNS records
Domain registration doesn't mean that much. Many similar domains are already registered, eg python2shell.com is 5k aftermarket but js2shell.com is unregistered. Might not be a bad investment to register the .com for all the top PLs.
There is now an iron clad defense against all memory safety bugs leading to RCE that is actually practical to use in production in many cases, and people should start taking it seriously. Any PHP install that has ~2x CPU headroom should be switched to a memory safe Fil-C build immediately. More generally, anyone running network-exposed C/C++ code that is not routinely pegging the CPU should recompile with Fil-C ASAP.
"The entire world should use 2x more compute" is not a real answer. You can do that on your own personal computer which has compute to spare. For servers, you're already paying for the relevant amount of compute to serve your thousands or millions of users, and every % of overhead matters at that scale. You are suggesting everyone allocates a 2x budget for server-compute, or I suppose you're only talking about hobby servers where people are running tiny workloads and had so little traffic it doesn't matter?
In addition to what my sibling comments have said, there is also the advantage of pushing the ecosystem to safe and fast approaches as a whole. Imagine if the default was to run C/C++ software under Fil-C, if no other measures where taken by the developers, e.g. if the consensus interpretation for one of the current security regulations (NIS2 etc.) mandated it. There would then be an enormous incentive for software to provide faster alternatives to Fil-C, as there where 2x-4x speedups for the taking!
Come to think of it, I believe it would actually be a good idea to lobby for exactly that. Memory safety issues have been a plague in IT for far too long.
Large, well-optimized services are running at high CPU utilization all the time. But there's a long, long tail of services that are running well below 100% utilization almost all or all of the time, and it's not just hobby stuff. Vulnerabilities in those services are still real and can be very important, and trading some otherwise idle CPU time for an absolute shield against memory safety issues is a good idea. Even for some services that do have high CPU utilization it may be a good trade to pay for more CPU to get that shield in this new world.
Running a parallel PHP-filc deployment at such times at even 2x costs would 100% be worth it. Especially that you'd only be focusing on web-facing deployments (and not background processors).
People keep defending PHP (as they have been for ages) saying things like "oh, it could happen to any platform, this one's just so popular so the odds are higher" but then you take a peek at the diff for this fix and realize that nothing has changed since Fractal of Bad Design was published a decade ago. PHP is a scourge and unfortunately a still too popular one. The best time to realize the only safe option is to stop using it was in 2010, the 2nd best time is now ..
For now this is just one person posting about it. Can be real, can be a mistake, can be a hoax. But if it's real, then OpenAI once again fudged up really bad.
Edit: and it's live now 1hour 43minutes after. Edit 2x: well I spoke too soon. not actually live - the 8.4.27 tag appeared, but it's still an empty shell with no amd64 image to build from. Maybe other architectures can be built from though. Ugh. Now we're at 2hours 24minutes in. I know process steps take time/can't be rushed, and I know people mean well and surely some are unappreciated for what they do. That said: this debacle is making me want to reassess my deployment pipeline choices.
how does Docker not yet have a new, official PHP image ready, given such a big heads up? https://hub.docker.com/_/php Nuts this wasn't ready to flip on at :00 (or even earlier given the PoC exploit and even the official PHP fixes were out well before). Now we are 52 minutes past due. (posting comment again, because the other thread i posted in was marked as dupe.)
It went a few seconds ago. I was also surprised they didn't have advance access but thinking about it, with the whole thing being a public Github pipeline, it's unclear how they could have achieved it whilst simultaneously keeping the patch private. Is there precedent?
And now, at 2hrs 55mins past the PHP release, the amd64 image is available. Although it appears that the servers hosting the image are getting hugged to death because I can't actually download it.
Now they should be actually available and pullable! The only problem is that it took 3 hours with a huge security problem already exploited in the wild.
This is obviously bad, but in my 20 years of hosting with PHP, I've never had to take the steps of taking down servers preemptively. It's not good, but honestly, and I think the way this was handled could leave a lot to be desired, I think this might be the "worst" we've had with PHP, and it took a while to get here.
FWIW this is the most mainstream vulnerability in the new era where everyone has access to AI agents that have the potential capability to find and widely exploit the vulnerability far faster than the past timeframes for disclosure and patching.
That partial stack trace linked above seems to match this GitHub issue, which has much more information: https://github.com/php/php-src/issues/24488 (double-free introduced in 8.5.12)
From what I can see, this causes a crash only, and isn't weaponisable. It's a use-after-free, but the reclaim window is zero by construction.
Is there anywhere good to get some sort of reliable stream of information about this possibility?
It's going to be pretty bad if we all panic to get the latest PHP up, and all confidently roll out our updated websites, just for them to still be vulnerable to something serious anyhow.
Not even $700 a month? Seriously, there must be thousands of highly profitable companies depending on this guy’s maintenance. Once this is all sorted, please hassle your employers to give something back to him!
Yeah this, I always see so much hate towards businesses for finding tax loopholes or not donating etc but people forget that businesses are made of individuals with their own often conflicting subgoals, but overall has to try to maximize profit so they will never voluntarily pay more tax than legal minimum or be philanthropic if they do not have to or do not benefit explicitly.
Thank you for calling this out. I absolutely rely on him so I decided to contribute $100/month even though I'm a solo dev with a business yet to see profit. But I absolutely rely on him for my server(s) PHP packages.
Speaking of, the PHP PPA was pretty unusable all day. I wonder, if this was just high demand or intentional attacks on launchpad servers to prolong the exploitation window.
It's not exactly uncommon, it's basically C's equivalent to exceptions. It lets you avoid having to do an extra error checking branch after every fallible operation and can quite significantly speed up the happy path of a language VM.
I know but I don't think the risks justify using this, as demonstrated here. "It's fine when it's used correctly" except it's so hard to use correctly. It completely messes up any analysis of codepaths because you have this "time travel" footgun that can bypass everything.
Exceptions aren't great for that either, but languages that feature them at least have the tooling and support features to make them work. C has no destructors or anything to handle exception unwinding cleanly. Scheme has call/cc, but scheme has a big runtime and garbage collector to deal with the fallout.
Let the branch predictor do its job and implement error checking properly, I say. If performance matters so much that you worry about pipeline flushes and icache thrashing, surely you wouldn't be using PHP anyway.
setjmp, longjmp and gets are 3 function I would absolutely ban in any C codebase I would be responsible for. Maybe strncpy too. and strtok. C is fun.
> It's not exactly uncommon, it's basically C's equivalent to exceptions.
longjmp is very uncommon, I don't recall seeing any high-quality C codebase using it, and if you want exceptions, you should pick a different language because longjmp doesn't really give you comparable semantics. It's basically saying "ok, computer, f--k my s--t up".
The fact that OOM conditions are an enduring source of exploitable vulnerabilities in PHP really should give everyone a pause. Like, that's not a thing in any sane project.
It's C's equivalent to exceptions, except without any of the stuff that might actually make exceptions safe and reasonable to use in other languages.
There's no automatic cleanup of anything, no built-in way to even register things for manual cleanup, and it doesn't even consistently save/restore the values of your local variables. A local variable that was mutated between the setjmp and longjmp may end up with the old value or the new value depending on where the compiler decided to store it. The documentation does mention this and says that you need to use the volatile keyword to avoid it, but in typical C fashion there's nothing to enforce this, it's just up to the programmer to remember it.
It is extremely uncommon in C codebases because it is extremely dangerous. It makes hazards like pointer arithmetic and manually-terminated strings look like a walk in the park by comparison.
I'm surprised by CGI. The vulnerability description talks about a second request being affected by corrupted state from an earlier request. But I thought CGI only processes one request per process?
Despite this coordination, WP-Engine (who's major business is hosting WordPress sites) is still on PHP 8.4.26 a full 2.5 hours after the patch is publicly available.
GitHub uses this metaphor, and, as another commenter already aptly described, it could be nothing more than a fancy name for namespaced branches, on the server side.
On the client side, "forks" are usually different repository clones with different remotes and a "coincidentally" shared history.
But you can also map forked repos to multiple remotes of the same repository for example, instead of folders.
Assuming that forks would live in separate clones/blobs on the server is not really based on anything, so I think the warning is a good middle ground between explaining what forks are and how they handle them, and giving actionable advice.
It's also better suited for PR:
"Fork me on GitHub"
vs
"Branch and push your own clone on GitHub, using our shared blob optimizations".
I think the warning is clear and there's nothing misleading about it, but others have already pointed this out and git can be tricky.
It's so good at providing the right level of abstraction to everyone though, it seems!
Similarly, GitHub invented the term "Pull Request" (aka PR, lol).
Not a git-owned term.
But "merge request" isn't a Git primitive either!
And, with Forks and Pull Requesrs, GitHub made a particular workflow in Git approachable to anyone!
I love GitLab, but people get confused by Merges, myself included, so the GH-enabled workflow of favoring ff-only merges, without merge commits, with quadi-linear history, became the norm and helped Git succceed!
But I also appreciate being able to do all kinds of different workflows.
So PRs were positive-sum PR at the time, I'd say. When they became popular, I was still taught Subversion and CVS at uni, alongside Git as "the new thing". Ar that time, many people considered the older systems simpler, and pondered SVN as the most reasonable middle ground between CVS and the decentralized concept of Git!
There is little difference between a tag and a branch in git. There is just the convention that tags reference the same commit forever, while branches move.
On github forks are part of the same physical repository. You could imagine that each logical repository is just a namespace for branches and tags, backed by the same physical repository.
I do consider the warning a bug if github, it should check both tags and branches for commits which are to be considered part of a logical repository.
It can mean either, it's a consequence of how github optimized their backend storage so a 100 forks of a repo initially take up the same space as 0 forks
If LLM's are going to keep finding vulnerabilities of this magnitude, we'll be sure to face a computer worm event of unprecedented scale soon. Best be ready for the moment the lights turn off
So far Ubuntu LTS isn’t picking up the new packages for me via apt update, and Laravel Forge appears completely unresponsive as a result of being flooded by people trying to update their servers.
And I'm maintaining a box on 18.04 over here, and lo and behold its Pro subscription isn't showing up as active, so I couldn't get the update even if they do release it.
Going to migrate the box to Debian in-place. (Or Gentoo, the way things are currently going.)
Some have, but others are still showing "needs evaluation", and still no update for 20.04. I've just turned off php for now, as we only used it in a couple of places and won't be missed for a day or two.
i just took down all my PHP sites for the last few hours. they’re proxied behind Cloudflare so i know there were mitigations, but infrastructure can’t be breached if it isn’t running!
Similar here, except I didn't want to actually shut down the servers, because then I can't patch them! My solution was to just turn off Nginx, which prevents anything from reaching PHP. Then I stuck a caddy server with a temporary config so we get actual 503 maintenance responses.
It seemed to be helpful for others too so I packaged it up, should work on most Nginx / Certbot servers. hopefully its useful: https://github.com/Indemnity83/popcorn
I once wrote a PoC for reading data off of a dead Open Compute Grand Canyon server that wouldn't boot by sneaking it off of the HDDs through a sideband through the BMC. Never say never.
Well they did specify "successfully." EITW is a pretty broad tag, just means attacker are probing servers. I'm not saying it's good but there are usually some pretty big caveats with remote-remote memory corruption, don't know if all the people dooming are aware of that
> Exploit portability and reliability depend on the PHP build, extensions, frontend behavior and allocator layout.
>Given the severity of these vulnerabilities, the PHP security team provided minimal source-backports for PHP 7.4, PHP 8.0, and PHP 8.1 to help people building from source or without access to an LTS vendor.
Since I have to go through a bunch of php repos today at work I ended up releasing a CLI tool that automates that process by listing out the steps you need to take to stay away from the vulnerability.
Here's the link incase it helps anyone https://github.com/Amsozzer1/php2shell-repo-audit
Dude, today of all days is not when I'm going to trust some random CLI tool that was vibed out. I'm not saying your work isn't helpful, but it would probably be a lot better to just release your prompts you used to build this and let others build it on their own.
I wouldn't listen to him. This is very helpful to people that might be managing dozens or hundreds of servers and need a way to quickly figure out things. It's literally open source and we can point our agent to it and have it examine the source code for anything that looks suspicious first. No need to sit here for a couple hours trying to go back and forth and create something that you already took the time to do. Thanks for the work!
Great that its out but if you depend on pecl for additional extensions and need to rebuild docker container it will probably fail because pecl is having issues for last few hours[1].
My hosting provider just informed me that they took down my website over this to "protect" me. It's a static website that does not use any php. But it's a generic LAMP hosting provider so they just took down all their hosted websites. I had it on my to do list to migrate that to cloudflare anyway. So, I guess I'll be doing that soonish now.
When every neighbour decides to leave their doors unlocked simultaneously,and the entire world knows it, maybe barricading the village is protecting you
...and If you have a server in a closet still running PHP 5 or 7, hosting that project you’ll rewrite “next quarter,” this might buy you some time: https://github.com/analogic/phpsafepass
Yes, there have been decades of talk about this already—ensuring you isolate/jail the PHP-related processes and run them with an unprivileged user, etc.
I've created patched Dockerfiles for EOL PHP versions. The patch is obtained from official source trees.
I've also published the built images from them to GitHub Registry, but of course it's best to inspect any public repo/docker image before using them blindly.
I fail to see how that’s useful. Why would I care about the layers inside an image when I could just extract the entire filesystem inside. Even then it is not useful if we don’t have a culture of reproducible builds.
Fair, "inspect the image" was a bad way to put it.
What I meant was: don't trust prebuilt images from a stranger, including mine. I've provided them just as a convenience, the Dockerfiles and patches can be easily looked-through, and building them yourself is the safer option if you need these docker images.
Debian always seems to be the grown-ups. I'm a Linux novice so I couldn't get Nvidia drivers working on it but that's the only reason it's not running on my desktops.
Really makes me appreciate using language with exceptions and not that crazy "manually check if error handling is required - and do it everywhere". The fix adds:
Many vendors do it, but on a set schedule "patch Tuesday" and some will release vague "mitigation steps" but honestly those usually come with the patch.
Tell them to take anything with PHP offline, so that it isn't available from the public internet. That is how Netcup and Contabo are handling Wordpress hosting until they've upgraded all affected packages.
There are already functional exploit scripts on GitHub, you can target any Wordpress site right now.
> PHP 8.5.12, 8.4.27, 8.3.36 and 8.2.35 fix two critical vulnerabilities that can allow unauthenticated remote code execution. All PHP users are strongly encouraged to update immediately.
Earlier versions are not fixed by PHP official and need vendor patching where available
I'll give a shoutout to Lithium Hosting. I was able to log in and update my PHP Pool per their custom control panel and switch all of my sites over to the latest fix: 8.5.12.
"I'm not a real programmer. I throw together things until it works then I move on. The real programmers will say 'Yeah it works but you're leaking memory everywhere. Perhaps we should fix that.' I’ll just restart Apache every 10 requests." -Rasmus Lerdorf
Not sure how, but from the announcement: Who is at risk: all PHP installations serving web requests, including PHP-FPM, Apache with mod_php, php-cgi, FrankenPHP and LiteSpeed.
Also, CGI PHP skips request cleanup on init failure.
I'm 90% sure CGI can't be exploited this way in default configuration with ASLR and 99% sure if PHP is configured with memory_limit=-1
That said, don't be an idiot and switch to CGI instead of patching. I'm like one of three guys running PHP in CGI mode and I'm vaguely satisfied I have the most resistant configuration.
The reason, BTW, I run PHP in CGI mode is so I can (moral equivalent of) suexec to a locked-down sandboxed environment that limits exploit blast radius. I could do the same with fcgi daemon, but the suexec is stateless, and roundcube doesn't need the performance.
In general, anything stateful or long-lived is just one more thing that can go wrong. One reason why the trend of turning everything into a persistent daemon drives me nuts.
I think there's a lot to learn from the last twenty four hour's events. An absolute nuclear bomb of an exploit affecting every version of PHP back to 2012 (which nobody should be using of course, but I've worked in plenty of environments that are not up to date).
The thing that's annoyed me the most is the speculation and misinformation, filling in the gaps. Folks looked into the php-src and figured out one of the vulnerabilities, starting saying you should disable certain php settings and then core PHP developers on obscure mailing lists hinting this isn't enough.
Given how inexpensive it is for agents to scan popular OSS projects, disclosure needs to be more discrete and you cannot publish fixes to OSS before disclosure. People will be and are watching for this kind of thing already.
While the fix was not published I genuinely thought a quick service rewrite to some other stack (say Go) would make sense as a fix. (Assuming high integration test coverage )
For those who can’t patch their PHP for a variety of reasons right now, here is a proxy I developed that can sit between nginx or apache and your PHP-FPM, to sanitize inputs and prevent this (and other) attacks:
I have this slight suspicion this was not the last critical PHP apocalypse ... :(
Some web-services are back up again here in central Europe, but some
are not, which is very annoying. Kind of surprising to see how much
PHP is actually used. Hate it or love it, PHP really is very important
still - lots of the web depends on it.
> 8.1 and earlier Not patched: these versions have reached end of life and will not receive an official fix
I would not recommend using PHP. The PHP team keeps breaking backward compatibility and trying to introduce new features instead of focusing on fixing bugs and hardening the compiler.
What I've been feeling lately is that security vulnerabilities will inevitably keep being discovered, and I worry whether humans can ever patch all of them.
This is extremely damning for Cloudflare. I had a bunch of clients telling me Cloudflare is all they need to prevent this, and they want to get that on their site instead of upgrading PHP.
I have not seen confirmation Cloudflare is doing anything except playing whack a mole with certain request patterns. PHP Core Devs have been clear you need to upgrade. If this is true, it's disgustingly opportunistic that Cloudflare is using this critical security time to lie to people that they are safe.
It's great they are doing mitigations, but they admit themselves, in fine print, that this will not protect you from the vulnerability
Why is word circulating that you can just sign up for Cloudflare and be 100% protected from this? They are burying the leed and trying to get new customers, and it's working.
What I did on our WordPress boxes while waiting for distro packages (CVE-2026-109618 / CVE-2026-109619)
1. session.upload_progress.enabled = Off, in php.ini and as php_admin_flag in every FPM pool, so per-directory config can't turn it back on. It's one of the two confirmed consumers in GHSA-6wmf, and the validated FPM path depends on it. Almost nobody uses it, and the advisory suggests leaving it off even after patching.
2. Refuse multipart request bodies at the web server, before PHP parses them. All of the GHSA-w8hw out-of-memory strategies go through multipart parsing. On Apache it's a rewrite rule matching a Content-Type of multipart/form-data that returns 403. On Caddy it's a header matcher that responds 403. The cost: every browser upload breaks (media library, plugin zips, importers). Check your public forms first.
3. Check your SAPI. Both bugs have confirmed RCE against mod_php. FPM is narrower: the validated path needs upload_progress, and the early INI consumer only applies if your front end sends PHP_VALUE/PHP_ADMIN_VALUE. To check, grep your Apache, nginx and Caddy configs for it, and run apache2ctl -M | grep php.
4. pm.max_requests = 1 in the pools. A worker serves one request and exits, which breaks the stale-state chain: the "producer" and "consumer" requests must land on the same worker. It costs a fork per request.
5. Lower max_input_nesting_level and post_max_size, per the advisory.
6. Housekeeping that should already be done: no .php served from uploads directories, and remove any stray phpinfo.php. Scanners request it constantly, and it tells an attacker your exact build.
I’d rather just some sort of tag. Because sometimes it can be useful. This is a case where the community here can scrutinize the output and actually pull out useful data or steps or even starting points when information is coming in so fast for a developing story/issue
The (pretty obviously Claude'd) responses with actual steps you could take to mitigate were 1000% more useful to me than the "SHUT EVERYTHING DOWN WE'RE GONNA DIE" and the "stop posting AI slop" posts were, that's for sure.
It was your response. Of course you prefer your response.
The fact is you had no idea how useful or dangerous your advice was. PHP maintainers said to shut it down, how many people followed your advice instead? Did it work or just leave them vulnerable? Do you know?
Because you're heavily implying that the people who knew about the details of the vulnerability were panicking and thank god we had you with an LLM
Why don't you do something useful and rewrite it so it's not claude output any more, but says the same thing in a way that you're satisfied with?
Then your own comment would not be such low effort and useless human slop.
Do you agree or disagree with the comment's claims? Did YOU verify anything? Let's all hear you fact check and proofread and reword what it said so it matches your standards, instead of just listening to you bitch and complain without offering any useful information.
Or do you not actually know anything about PHP administration, programming, and security, so you're only capable of information-free drive-by anti-ai posts, without any other useful content or corrections?
People have been saying this for the past 16 years, but the reality is once a system is in production over time it becomes increasingly risky to replace it. Because over the life of a piece of software you make tons of small fixes, resolve bugs, adding customer-specific functionality, etc. that you'd completely overlook when planning our requirements for a rewrite. Which is a big problem when other systems are dependent on the software operating a specific way i.e. APIs, web services, and so forth. Not to mention the economics of a rewrite also has to make sense. Nobody is going to spend 2-3 years recreating what they already had and get no additional functionality out of it. Certain software basically has to get so bad that literally anything replacing it is better than what came before for replacing it to be the right approach.
People shouldn't be using PHP. I was shocked some security focused websites are even using it. I just hope there's nothing of value on their servers and that it's not connected to their internal network in any way. In my experience this is almost always the case because it makes maintenance and development easier but effectively exposes your entire organization to the internet.
That 70% of the internet still uses it is shocking to me. These organizations deserve to get burned badly. Let this incident be a warning to all of them!
PHP is not a particularly insecure language. It’s certainly more secure than something like C or C++. Certain PHP applications are known to have vulnerabilities often, like WordPress.
PHP is a memory-safe language. This vulnerability is a memory safety bug in the VM, which does happen from time to time. It happens with V8 (JS), Java, C#.
Know how recompilers are porting video games from one platform to another these days? That exact trick works just as well for finding vulnerabilities. Broadly.
1. Hey LLM, turn this binary into source code.
2. Hey LLM, see any glaring security issues with this source code?
So how is PHP being distributed in your funny world? Because I can tell you, even if you put it behind “register with your work email,” whoever seeks the binary will find it.
> Know how recompilers are porting video games from one platform to another these days?
They actually aren't. Most of the claimed cases of "recompilation" are just an emulator packaged into the same binary as the game so you can't tell it's an emulator, or are for projects that already had their source code available (in which case "porting" to WASM is trivial because all of the hard work is done by the people who write your-language-to-WASM compilers, and you just need to do a little bit of work to adjust your toolchain to use it). Everyone just takes slopshit at face value and shares clickbait without actually checking any of the work done. It's infuriating how empowering this software is for liars, honestly.
Can't we fingerprint the code in github and elsewhere and tell AI labs to not do security reviews on the code unless (A) someone is a legitimate security researcher or (B) someone is the owner of the code.
Yeah it sucks, but the alternative could be worse.
Looks like a co-ordinated disclosure between Wiz, Calif and OpenAI:
https://www.php2shell.com/
https://www.wiz.io/blog/php2shell-php-rce
https://calif.io/php2shell/
https://openai.com/index/coordinated-disclosure-of-critical-... (not yet live)
https://thephp.foundation/blog/2026/10/21/todays-php-securit... (not yet live)
I feel like all "non-inner-circle people" here are taken for a laugh. OpenAI and these security companies sat on this for 2 months, decided for themselves who gets access to an early fix, and then leave the rest out to dry while they failed to properly contain it.
The official interim fix for php8.5 [1] could have been published 24h ago, or even 2 weeks ago, without revealing any security details. Specifically once the POC came online. Would have been significantly more useful than these polished blogs.
Perhaps I'm missing something here, but the costs (dev/sre time, missed sales, potential data leaks and hacks) of the way that this was handled is significant.
[1] https://github.com/php/php-src/security/advisories/GHSA-6wmf...
>OpenAI and these security companies sat on this for 2 months
these security companies reported it 2 months ago. it took a month for the php security team to acknowledge it and another month for the php team to develop & release the patch.
if you're going to be upset at anyone it should not be the reporters.
>The official interim fix for php8.5 [1] could have been published 24h ago, or even 2 weeks ago, without revealing any security details.
publishing the fix = publishing the security details.
This really sounds to me like "they filled out some webform" or "sent an email to security@php that read like any of the ten billion we found vulnerability in your code please send money emails they get.
If I had details on a RCE like this I'd report it but if I got no response for a WEEK I'd be trying other venues.
I imagine more details will come out over the coming days, but it’s not uncommon for severity to be under-estimated in the beginning; and then “oh shit” as you dig deeper.
We don’t know when it went from a “memory safety issue” to “php2shell/RCE”.
Calif’s report is a little light on timelines, but reading between the lines, it seems they took a while to turn this into an actually exploitable vulnerability.
Finally, at least pre-LLM (and maybe a bit outdated now), responsible security disclosure norms is that you usually do wait for vendor (up to 90d) if there’s no signs of active exploitation. Even if it’s a RCE. Actually, especially if it’s a RCE.
The last thing you wanna do is go pinging random non-security PHP contributors or maintainers and have it leak with zero patch. That is truly the worst outcome.
Yes, this is bad, but also, it’s apparently been bad for decades; and it could’ve been much worse.
According to this post, one of the researchers was a former PHP security lead who already knew about the bug since 2004. So I'd assume they would be taken as credible by the current team https://calif.io/php2shell/
As I mention elsewhere (https://bugs.php.net/bug.php?id=78876) I'm very confused. Looking at the PHP bug tracker the specific bugs were fixed. So my best guess is that the LLM was able to find alternative variants that still worked? But then the report makes less sense.
Assuming that it could have been spotted in their inbox, amongst a probable flooded of LLM slop like a number of security mailing lists for open source projects that I know of. We've all seen the impact on open source github issues, hackerone etc. The same is happening to standard email disclosure paths.
These illustrations are neat but severely distracting given that each make a mountain out of a molehill.
>This really sounds to me like "they filled out some webform" or "sent an email to security@php that read like any of the ten billion we found vulnerability in your code please send money emails
i highly doubt it. these are pretty big names in the security sector who have plenty of experience reporting high severity vulns.
and they also have plenty of exposure to their motherships burning money on LLMs
I've said elsewhere I am sick to death of reading AI written "security disclosures". Even for genuine issues, it just saps my motivation to fix them.
That said, PHP team handled this poorly. How does letting everyone know so they can "prepare" help anyone at all. It just creates panic.
If you provide forewarning, system administrators around the world in various time zones can get ready to update at the same hour the fix is released, which is very important. Being hours late is not acceptable for a vulnerability like this.
And yet it seems all their forewarning did was lead to the proof of concept being leaked many 'valuable' hours before.
Are you victim blaming the reporter?
If you have a bad process, fix the process.
Why does the PHP security team need to acknowledge it and develop the fix? It's open source software.
If you want an orderly fast global rollout you need to have the maintenance team and distributors working together.
So if Wiz produced their own patch to PHP, and Calif produced their own (slightly different) patch, and OpenAI produced their own, which version should I use, as a user of PHP? Should I manually merge them? Is Calif's better than Wiz's? Is OpenAI's better than Calif's? Are they complementary?
That does happen with downversion software. Red Hat may distribute a backported patch to some component which isn't the same as Canonical or Debian's.
Most users, who don't know the answer to your questions, rely on the distro to figure this out (and often pay good money for it).
They already were in communication with each other. They could have come together and decided on one that mitigates the issues they've found.
So anybody can just push out a new release of PHP?
Yes, someone could have published a safe version for people to use for the 2 months to get the actual fix done.
>Yes, someone could have published a safe version
this is basically the same as releasing a working exploit.
And that's not a bad thing. If it was, the the logical conclusion would be to never publish the fix and don't preemptively patch before active exploitation.
Yes it is.
Say I release a fix. I'm some rando but I go out to the world and say I fixed an issue with php. Use my version instead! Not telling you what I fixed, it's a secret, just trust me.
It will take, with LLM help, attackers a couple hours, tops, to reverse engineer my fix into active exploitation. Meanwhile, I'm some rando so no one's even heard of me, people who do hear don't automatically trust me to install my fix, so very few people have my fix. Meanwhile, the exploit is out there thanks to me and people are getting their sites hacked thanks to me.
That seems like a problem, no?
How is what you are describing any different than what happened today? Except the vulnerabilities were also explained. You can say that sites are getting hacked right now due to them releasing the security update.
>I'm some rando so no one's even heard of me
Why do think people need to have heard of you. If you are reporting this issue directly to distro maintainers, security companies, hosting companies, etc first you can help use their names as part of the marketing push to raise awareness.
> How is what you are describing any different than what happened today?
There was an official patch within a few hours. It probably would have been a lot longer.
And that was the screwup case. If today had gone correctly the official patch would have been out by the time the bug was public.
Sort of by definition of open-source, yes. It's just that nobody downstream is likely to accept Joe Public's random fork of PHP.
You're confusing PHP the product with PHP the codebase. The former is what is the only relevant part in the security world, where a product is synonymous with its vendor (even FOSS).
I mean, it's all semantics at the end of the day.
The PHP maintainers have generated a certain amount of goodwill over their long service, which leads downstream consumers to trust their releases over every other packaging of "PHP the open source codebase".
Nonetheless, there are countless forks of that codebase, and there are other releases than the ones made by the PHP maintainers. Any particular downstream could switch to another source of releases if presented with a compelling enough reason.
Did start writing software this week?
Because...that's what the PHP security team does?
No one needs to use their work, or indeed PHP at all.
But that's why the PHP security team exists.
What's the other choice? OpenAI et al could have developed a patch (for all we know they did) but you need the PHP team's participation to get it out. The alternative would be to fork the project and put up a forked release with the fix, which would have been incredibly disruptive.
I'm glad they didn't do anything disruptive, then. Like wind the world's CIOs up into a frenzy of FUD and bring thousands of servers down in a coordinated panic attack synchronised to the minute.
Imagine if they had just patched the code and rolled it out with an advisory?! Oh my GOD! Won't someone think of Sam Altman and his huge pile of debt?!
Pre AI, silently publishing a fix to a security vulnerability was considered bad practice.
Post AI, Its efficiency pre announcing the exploit to bad actors until the official disclosure.
You can just watch the diff log of every open source project with a small local model, and look for anything that touches buffers, function pointers, or shell integration.
It could be an hour between release of a fix before the exploit starts attacking servers.
Guess what also could happen within an hour? A coordinated Internet wide panic that shuts down all vulnerable servers.
---
We actually have a recent example. OpenAI hack.
An undisclosed vulnerability fix to a image formal lib; packages into debian 12 running in a docker, used by imagemagic, used by discourse running OpenAIs user forum.
What would you have a security team for then?
To handle the official solution and drive long term changes to reduce similar security bugs from happening again. The current PHP security team does not seem capable to promptly release a fix, so having a community fix first seems preferable.
Mitigating a bug and developing a proper solution that is maintainable long term and supports future changes being made to the software take different amounts of time to develop.
One concern with the current environment is that as soon as a release comes out for such an important open source project, people will immediately point bots at the release to look for changes that might be related to existing security issues. This means that putting out a quick out-of-band release is guaranteed to result in people racing to exploit the problem before many even know there is an update out.
Whether keeping the update quiet and including it in the next normal release, where there are more trees obscuring the wood that is the security concern, and announcing the bug a short time later once anyone using distro updates or otherwise keeping on top of things have updated, would be safer overall than what has happened today is up for debate. I can think of arguments in both directions.
--------
[1] which does have a slight whiff of AI marketing about it - would a human-found issue, without the option of a big AI company to claim some credit, have been handled differently?
This is not a "concern", this is literally what happens. Even prior to AI vulnerability scanning, release notes and diffs for any normal release or security patch of popular software were analysed and used to develop exploits, which could then be applied against non-upgraded instances. Nowadays, AI is doing this en masse and automatically producing exploits. And, as has been demonstrated, nowadays even the rumour of a major security bug is enough for people to find it, as people will immediately burn huge volumes of tokens looking for it.
Nor can you just keep it quiet and smuggle it out in a regular release as you suggest. For one thing, changes in important software are be linked to commits and have pull requests, reviews, etc. Changes without these will immediately raise suspicion, as either a malicious change snuck into a release, or as a "quiet" fix to a major vulnerability, completely undermining the purpose of keeping it quiet in the first place. Moreover, major vulnerability fixes cannot be "quiet", because the whole point is to get as many people as possible to upgrade as quickly as possible. If PHP (or whoever) push out a release containing a major security fix, but don't make this clear, then many people will be in no rush to upgrade, and will get pwned.
> This is not a "concern", this is literally what happens.
Sorry, I should have been specific: the concern is that this will happen faster than even the more fastidious admins (or daily or even hourly automated checks) will spot and apply updates.
> nowadays even the rumour
I think a lot fewer people would have paid attention at all without the rumour. Some ne'er-do-wells might have scanned a larger update for security issues otherwise, but I suspect most of those spending tokens on PHP this week would not have bothered had there just been a standard maintenance release that may or may not have included changes for a security issue that may (but probably not) have been so globally significant.
That is, at least in part, why the question of how to manage the release of updates like this is not a settled debate.
> then many people will be in no rush to upgrade, and will get pwned.
The worst case that we may be heading towards is that for any services on public facing infrastructure we might have to automatically apply updates with little or no time to verify, just to try be ahead of the ne'er-do-wells, with even superficial updates not mentioning the changes until a short time after to avoid giving clues to those who will scan for security issues if any such is mentioned (or nothing is mentioned - saying nothing about a security-only update only works if you say nothing about all updates, and you don't want to hold off on security-only updates on a slow moving project that might not have a non-security patch for quite some time).
It's not possible to publish a security patch for an open source software report without revealing security details anymore (and as of the past couple weeks I would not count on being able to do that for closed source binaries either). The moment you push publish everyone knows previous versions are compromised
“OpenAI and these security companies sat on this for 2 months”
I don’t think this what happened at all, and even less so to specifically call out OpenAI.
The issue was discovered using their model, it was disclosed, and the PHP team took months to address it. Eventually it leaked.
This is a process / people failure that does not involve the people responsible for discovering it.
this is the same tired conversation whenever coordinated disclosure happens
"we the people deserve to know about vulns on day 0"
oh yeah? and what happens when a 0 day is released?
it's the same ignorance over and over.
You can't do secret releases, people will figure out what you added or changed.
But they could have accelerated the patch release once the embargo was broken and rumors of a PoC started going around. There was no need to wait 12+h today until the release.
Maybe the NSA ‘requested’ some time to use the exploit on some high value targets.
Sure, it’s PHP, but plenty of companies or organisations might have some PHP running somewhere; and once you’re in, lateral movement becomes a lot easier.
The NSA does not need to "request" time to use an n-day vuln. They have more 0-days than you can imagine.
They literally employ full-time Vulnerability Researchers doing nothing but 0-day discovery and PoC creation 24/7 to add to their horde. Plus contracting with the MIC for their full-time VRs for the occasional project.
Exactly. Something like this is often the NSA realizing one of their pet vulns is being exploited in the wild by someone “not them” and so they burn it.
Php core security team decided who gets to know. The patch was huge it took that long.
See PHP foundation blog post on their timeline
> OpenAI and these security companies sat on this for 2 months
The PHP team knew about it since September 21st.
Maximizing the PR value...
And then they proceeded to cripple any of my agents working on this.
> OpenAI and these security companies sat on this for 2 months, decided for themselves who gets access to an early fix
Amazingly, AWS Linux has not been patched yet.
Of course it was OAI that decided those things, not the U.S. Government
it was neither OAI or the US government.
> Over the past two months, we led a coalition of maintainers, researchers, and security providers to address critical vulnerabilities in PHP, an open-source programming language used to run websites and web applications.
And they botched this as someone talked. To me this looks like they used this for a PR stunt and aimed for an RCE.
If I understood the timeline correctly, there was an announcement made somewhere that an RCE would be announce w/ a patch, and the internet just scanned the entire codebase, they really fumbled this for the sake of having a PR post for OpenAI.
On the other hand, I don't mind AI companies doing this sort of thing, I'm sure a lot of our internet infrastructure could benefit from these sorts of fixes and changes.
After the HN post came up, one security firm included "session.upload_progress.enabled", "session.use_strict_mode", and "php-fpm" in the SEO tags for their initial disclosure that a vulnerability existed. I imagine this was a good hint. https://web.archive.org/web/20261021005246/https://sansec.io... https://x.com/its5q/status/2112700519261032497
The somewhere was a loser on this very website https://daubois.dev/blog/cve-2026-109618-php2shell-rumors/
This post reads like pure slop to me
Honestly, who cares at this point?
The slop announcements are getting more annoying than the slop.
> And they botched this as someone talked. To me this looks like they used this for a PR stunt and aimed for an RCE.
This is a pretty constant theme in the infosec industry. The idea is that you want to do the "responsible" thing and let all the major, multi-billion-dollar companies patch first, so you form a secret club. But then, you share a very juicy, gossip-worthy thing with hundreds of people and ask them to sit on it for weeks. And guess what happens: they don't. Having worked for a big tech company, I've been involved on a couple of processes of this sort, and they all suffered leaks.
And rest assured, we'll learn nothing and try the same thing again next month or next year. Because what's the alternative? If you 0-day everyone, you get more hate mail, not less. It's all of sudden about you, not the vulnerable code. Microsoft or Cloudflare calls you irresponsible when asked for a PR statement, industry bloggers bully you, etc.
They haven't even been able to release the patch on time. Ubuntu still hasn't it
Debian has, though only for current stable (updates for oldstable and oldoldstable apparently about to drop) which might imply they had no advanced access to the update so could not pre-test and release immediately upon the coordinated announcement.
Sury is up for all versions too
Not true. I was able to `aptitude update` and `aptitude full-upgrade` before 10:00 AM EST (9:50 AM) and received the new php8.* packages and upgraded fine.
Still no update for ubuntu 20.04 which has support via ESM, even though the patch is available for php 7.4. There are a lot of people using older servers which still have ESM support.
Patches have now landed for 20.04 and other earlier Ubuntu versions. https://ubuntu.com/security/CVE-2026-109618#status
Anyone using a non-default version from the semi-official PPA by Ondrej Sury is still waiting for an update.
The launchpad server is throwing 503 errors all over the place, so that's probably the reason for the delay. Sury's own repo has the fixes all right.
I had an email from usn recently
at 15:00 UTC, spot checking, Debian 13 has a fix, Ubuntu 26.04 has a fix with their own patch version number, Fedora does not.
Ubuntu: https://ubuntu.com/security/notices/USN-8948-1
Fedora package status: https://packages.fedoraproject.org/pkgs/php/php-fpm/
PHP 8.5.4-0ubuntu1.5 (the fixed version for Ubuntu 26.04) has been downloadable for me via apt from security.ubuntu.com for about 30 minutes. Perhaps check to see that you're not using a different mirror?
You're correct, I was looking for the upstream patch number.
Wiz is owned by Google and Argon gets the main credits. So difficult to tell these days. But AI is obviously useful here.
Edit: was looking Wiz post when citation was from OpenAI
Of course it's useful, but you can't absolutely not leak something as big as this.
I heard this was leaked several days early and that’s why folks seem to be on the back foot.
I’d press go too - if something this big was known to some but not all…
We’ll all get through together
surprising it took nearly a month to acknowledge the bug
August 24, 2026: Wiz Research reports the vulnerabilities to the PHP security team.
September 21, 2026: PHP acknowledges the reports and begins developing a coordinated fix.
Took them almost 7 years even. According to the Calif write-up it was already reported in 2019 (https://bugs.php.net/bug.php?id=78876) and 2024 (https://ostif.org/php-audit-complete/).
Lol wait so OpenAI's LLM to discover this vulnerability most likely just looked it up in an old forum post?
This isn't a terribly uncommon method of 'discovery'. In maths and sciences there have been tons of papers that have highlighted something new but were never really connected to anything else and then largely forgotten. Later they are picked up by someone else and connected to a much bigger whole.
It's only one piece in the full exploit chain.
That's how 90+% of script kiddy -type hackings happen, isn't it. That or publically available databases without a password.
AI is gonna make our stuff pretty robust, eventually. The transition phase might hurt a bit.
That's what my agent did to find a UAF. It just took a public one from calif off the internet and found it still flagged asan.
The bug you posted was patched and fixed 6 years ago, and none of the other bugs in the audit showcase that issue. Are you sure these are the right links?
No way to prevent this, says only language where this regularly happens
Criticals happen in other languages all the time. You are seeing this with PHP in the news because it's used on 70% of the Internet.
https://fedi.katze.sh/@elise/117479383739450605
¯ \ _ ( ツ ) _ / ¯
LOL
PHP will always be the slop before AI.
So how does the exploit actually work? The best I can find is that they manage to use the corrupted generic decoder state to write a single pointer and associated PHP type information anywhere in memory, then immediately claim "this is RCE". Is that enough? From my (admittedly limited) understanding of such things, after writing code to the target memory you also need to be able to start actually running it. Or do they overwrite the PHP code (which is somewhere in memory) and then let the interpreter do its thing?
I am curious about that, too
Here was a PoC: https://jackalsyn.com/posts/php-up-2026.html
But it was withdrawn; now it says that it (CVE-2026-109618) is not an RCE and not even a CVE, apparently an addref call prevents the use-after-free. CVE-2026-109619 is still a memory safe bug, but they have no RCE for that one
Wiz Khalif AI
Why is WordPress out of that list? Isn't it the single major PHP installation in the whole Internet across hosted and self-hosted instances?
Well, WP is just a program written in PHP.
One of the most common PHP based applications out there, therefore a good comms channel (via their forums and any mailing lists, both public and for people who have managed instances with them or are otherwise paying for support contracts) to make sure people are aware of the need to update. That would make the company one worth keeping in the loop, if only in one direction, I would have thought?
Well, it would help if WP were actually controlled by one entity, but currently it's dominated by factions and infighting.
Fair point. I thought that had died down, though for some years I've not had reason to keep particularly informed about the state of WP so I could be missing a lot of hot gossip.
They have hosted instances as well though. Not sure their market share though.
Because the CEO of Wordpress has gone insane, basically.
Automattic is on the list, tho.
WordPress is down right now. A bit late for patching though ...
I agree, WordPress should be like the first thing they point out. I'd imagine most WordPress users don't even know it runs on PHP
WizCalif.. dude xD
> https://www.php2shell.com/
Boy, do I hate these PR websites masquerading as vulnerability reports. It's slop all the way down with these companies.
I wonder how early the domain was registered and when the first certificate was issued for it, whether you could’ve had advanced notice of this by watching the DNS records
Guess what, there are answers to that question! October 14, 2026 was the date the domain got registered.
Domain registration doesn't mean that much. Many similar domains are already registered, eg python2shell.com is 5k aftermarket but js2shell.com is unregistered. Might not be a bad investment to register the .com for all the top PLs.
Do they consider this an example of a "good" response?
It’s in-line with the rest of the pho eco system.
Yet it was leaked and I can't see a single "Here's this piece of code you can run to validate the fix actually works"
It's like slop for infosec markters
Thank you, Wiz Khalifa.
Related:
Today's PHP security release, and how we're strengthening security - https://news.ycombinator.com/item?id=50182987 - Oct 2026 (114 comments)
PHP2Shell: AI uncovers critical RCE in PHP - https://news.ycombinator.com/item?id=50180836 - Oct 2026 (146 comments)
PHP session.upload_progress heap UAF (CVE-2026-109618 / -109619) - https://news.ycombinator.com/item?id=50176077 - Oct 2026 (61 comments)
Security advisory: Critical remote code execution vulnerabilities, update now - https://news.ycombinator.com/item?id=50172041 - Oct 2026 (631 comments)
Tell HN: 2x PHP RCE CVEs with CVSS 10.0 Incoming - https://news.ycombinator.com/item?id=50167754 - Oct 2026 (60 comments)
Looks like there might be a second vulnerability: https://fedi.katze.sh/@elise/117479383739450605
There is now an iron clad defense against all memory safety bugs leading to RCE that is actually practical to use in production in many cases, and people should start taking it seriously. Any PHP install that has ~2x CPU headroom should be switched to a memory safe Fil-C build immediately. More generally, anyone running network-exposed C/C++ code that is not routinely pegging the CPU should recompile with Fil-C ASAP.
"The entire world should use 2x more compute" is not a real answer. You can do that on your own personal computer which has compute to spare. For servers, you're already paying for the relevant amount of compute to serve your thousands or millions of users, and every % of overhead matters at that scale. You are suggesting everyone allocates a 2x budget for server-compute, or I suppose you're only talking about hobby servers where people are running tiny workloads and had so little traffic it doesn't matter?
A tiny minority of applications use a vast majority of compute.
If 97% of programs use 2x more compute, the total amount of compute used in the world will be nearly unaffected.
Exactly, my fleet of machines is usually idling at 10% CPU or less.
In addition to what my sibling comments have said, there is also the advantage of pushing the ecosystem to safe and fast approaches as a whole. Imagine if the default was to run C/C++ software under Fil-C, if no other measures where taken by the developers, e.g. if the consensus interpretation for one of the current security regulations (NIS2 etc.) mandated it. There would then be an enormous incentive for software to provide faster alternatives to Fil-C, as there where 2x-4x speedups for the taking!
Come to think of it, I believe it would actually be a good idea to lobby for exactly that. Memory safety issues have been a plague in IT for far too long.
Large, well-optimized services are running at high CPU utilization all the time. But there's a long, long tail of services that are running well below 100% utilization almost all or all of the time, and it's not just hobby stuff. Vulnerabilities in those services are still real and can be very important, and trading some otherwise idle CPU time for an absolute shield against memory safety issues is a good idea. Even for some services that do have high CPU utilization it may be a good trade to pay for more CPU to get that shield in this new world.
2x PHP is still cheaper than Python and many other languages which most people would consider fine for your typical webapp.
Yeah I'd rather they spend 2x on compute than leak my data
Running a parallel PHP-filc deployment at such times at even 2x costs would 100% be worth it. Especially that you'd only be focusing on web-facing deployments (and not background processors).
> The entire world should use 2x more compute" is not a real answer.
Not in general no, but it is for PHP. If you cared about a 2x overhead why are you using a language with 10x overhead (conservatively)?
The patches are very dirty (thousands of `if (ZEND_HAS_OOM()) { .. return failure`); my first reaction is they've probably missed something.
People keep defending PHP (as they have been for ages) saying things like "oh, it could happen to any platform, this one's just so popular so the odds are higher" but then you take a peek at the diff for this fix and realize that nothing has changed since Fractal of Bad Design was published a decade ago. PHP is a scourge and unfortunately a still too popular one. The best time to realize the only safe option is to stop using it was in 2010, the 2nd best time is now ..
Extremely embarrassing for OpenAI marketing. How did they not catch this?
For now this is just one person posting about it. Can be real, can be a mistake, can be a hoax. But if it's real, then OpenAI once again fudged up really bad.
"skill check"
*rolls 3"
"Your IPO gets delayed another month"
Meow!
Edit: and it's live now 1hour 43minutes after. Edit 2x: well I spoke too soon. not actually live - the 8.4.27 tag appeared, but it's still an empty shell with no amd64 image to build from. Maybe other architectures can be built from though. Ugh. Now we're at 2hours 24minutes in. I know process steps take time/can't be rushed, and I know people mean well and surely some are unappreciated for what they do. That said: this debacle is making me want to reassess my deployment pipeline choices.
how does Docker not yet have a new, official PHP image ready, given such a big heads up? https://hub.docker.com/_/php Nuts this wasn't ready to flip on at :00 (or even earlier given the PoC exploit and even the official PHP fixes were out well before). Now we are 52 minutes past due. (posting comment again, because the other thread i posted in was marked as dupe.)
They even committed the fixed version to the repo, but it seems no images where pushed: https://github.com/docker-library/php/commit/e3eaff845f7a9f7...
Edit: Seems like GitHub has issues with merging PRs: https://github.com/docker-library/official-images/pull/22541
Ugh these comments on GitHub. Don't people know when it's best to just post nothing? "516 hidden items"
Have you ever experienced a "Reply-all storm"?
It went a few seconds ago. I was also surprised they didn't have advance access but thinking about it, with the whole thing being a public Github pipeline, it's unclear how they could have achieved it whilst simultaneously keeping the patch private. Is there precedent?
I have zero internal info, just guessing, but there's a PR from 5min ago asking to add someone as a reviewer for PHP images:
https://github.com/docker-library/official-images/pull/22544
Maybe the guy that has to click OK is asleep?
Images are there for docker now, but pecl has decided to have issues . ARGH
they have a long process with multiple build steps before the images reach the registry.
https://github.com/docker-library/faq#an-images-source-chang...
Yeah, I was very surprised to wake up just now and find docker still vulnerable.
And now, at 2hrs 55mins past the PHP release, the amd64 image is available. Although it appears that the servers hosting the image are getting hugged to death because I can't actually download it.
Yepp, we're seeing the Debian images now for 8.4.27
Out now!
https://hub.docker.com/_/php/tags
EDIT: 25min later, nope.
That's placeholders for images, you can't actually pull them yet.
https://hub.docker.com/layers/library/php/8.5.12-fpm/images/...
Any eta, when they will be available?
Now they should be actually available and pullable! The only problem is that it took 3 hours with a huge security problem already exploited in the wild.
Yep. That's a real issue. We took our applications offline until now.
They are being backfilled now starting from the 8.0 images it looks like.
This is obviously bad, but in my 20 years of hosting with PHP, I've never had to take the steps of taking down servers preemptively. It's not good, but honestly, and I think the way this was handled could leave a lot to be desired, I think this might be the "worst" we've had with PHP, and it took a while to get here.
FWIW this is the most mainstream vulnerability in the new era where everyone has access to AI agents that have the potential capability to find and widely exploit the vulnerability far faster than the past timeframes for disclosure and patching.
I'm legitimately surprised half the hostnames on the internet isn't serving ClickFix or whatnot payloads already.
The average phpBB or Wordpress, even if it's behind cloudflare, probably has a direct IPv4 that's not disabled.
Giving me log4j vibes.
Much worse. Log4j was hard to exploit and worked only in specific condions. And it was bad. This is something else.
But log4j was also extremely painful to patch, since every application bundled the vulnerabile dependency.
This is a storm, but hopefully quick to blow over with a panic frency of apt update or docker build.
The immediate exposure is faar worse here though, since its by design internet facing code.
A college enabled logging on their server as soon as they saw the news, and got dozens of attempted requests against index.php.
log4j was indeed the last time the internet storm center went to threat level yellow (as it is today again)
I think some of the issues could have been avoided here, if they would not chase the PR and blog posts.
What's the "other way" that would be better in general?
The release should've been done sooner once it was clear the embargo was broken and people figured out the vulnerability.
Some issues covered here: https://thephp.foundation/blog/2026/10/21/todays-php-securit...
More proactive outreach and better coordination with key downstreams.
Thanks to OpenAI, everything is a PR stunt.
Someone is saying there is a new vulnerability that works on the newest 8.5.12 https://x.com/_annieversary/status/2112933589943742598
That partial stack trace linked above seems to match this GitHub issue, which has much more information: https://github.com/php/php-src/issues/24488 (double-free introduced in 8.5.12)
From what I can see, this causes a crash only, and isn't weaponisable. It's a use-after-free, but the reclaim window is zero by construction.
Mr. President...
... a second feline has hit the stack.
Is there anywhere good to get some sort of reliable stream of information about this possibility?
It's going to be pretty bad if we all panic to get the latest PHP up, and all confidently roll out our updated websites, just for them to still be vulnerable to something serious anyhow.
This is why I like to have a minimum age requirement on package releases. Something like at least 2 or 3 days.
Anymore on this, I'm upgrading to 8.5.12 now and don't want to still be vulnerable?
Ondrej might appreciate some monetary love on a day like today.
https://www.patreon.com/cw/oerdnj
Not even $700 a month? Seriously, there must be thousands of highly profitable companies depending on this guy’s maintenance. Once this is all sorted, please hassle your employers to give something back to him!
Someone tell Ondřej to sell some self-published "guide to PHP" for $200 and we can easily expense that.
Yeah this, I always see so much hate towards businesses for finding tax loopholes or not donating etc but people forget that businesses are made of individuals with their own often conflicting subgoals, but overall has to try to maximize profit so they will never voluntarily pay more tax than legal minimum or be philanthropic if they do not have to or do not benefit explicitly.
Open source projects are severely undervalued.
While we're at it, please hassle employers to donate to OpenBSD so we don't get another heartbleed
Thank you for calling this out. I absolutely rely on him so I decided to contribute $100/month even though I'm a solo dev with a business yet to see profit. But I absolutely rely on him for my server(s) PHP packages.
Similarly Remi for the RedHat-derivative side of things: https://blog.remirepo.net (he's on vacation, but apparently is pushing updates now).
There is a one time option on his github as well for those who don't want to do subscriptions.
Speaking of, the PHP PPA was pretty unusable all day. I wonder, if this was just high demand or intentional attacks on launchpad servers to prolong the exploitation window.
Dude even backported the fix to his 5.6->8.0 branches
Newest: 5.6.40-104 which has the CVE fixes.
Advisories with the details are public:
https://github.com/php/php-src/security/advisories/GHSA-w8hw...
https://github.com/php/php-src/security/advisories/GHSA-6wmf...
>PHP uses longjmp()
Well off to a good start here.
It's not exactly uncommon, it's basically C's equivalent to exceptions. It lets you avoid having to do an extra error checking branch after every fallible operation and can quite significantly speed up the happy path of a language VM.
I know but I don't think the risks justify using this, as demonstrated here. "It's fine when it's used correctly" except it's so hard to use correctly. It completely messes up any analysis of codepaths because you have this "time travel" footgun that can bypass everything.
Exceptions aren't great for that either, but languages that feature them at least have the tooling and support features to make them work. C has no destructors or anything to handle exception unwinding cleanly. Scheme has call/cc, but scheme has a big runtime and garbage collector to deal with the fallout.
Let the branch predictor do its job and implement error checking properly, I say. If performance matters so much that you worry about pipeline flushes and icache thrashing, surely you wouldn't be using PHP anyway.
setjmp, longjmp and gets are 3 function I would absolutely ban in any C codebase I would be responsible for. Maybe strncpy too. and strtok. C is fun.
> It's not exactly uncommon, it's basically C's equivalent to exceptions.
longjmp is very uncommon, I don't recall seeing any high-quality C codebase using it, and if you want exceptions, you should pick a different language because longjmp doesn't really give you comparable semantics. It's basically saying "ok, computer, f--k my s--t up".
The fact that OOM conditions are an enduring source of exploitable vulnerabilities in PHP really should give everyone a pause. Like, that's not a thing in any sane project.
> I don't recall seeing any high-quality C codebase using it
Lua does. (though it does have the option to use C++ exceptions or MSVC stack unwinding instead)
It's C's equivalent to exceptions, except without any of the stuff that might actually make exceptions safe and reasonable to use in other languages.
There's no automatic cleanup of anything, no built-in way to even register things for manual cleanup, and it doesn't even consistently save/restore the values of your local variables. A local variable that was mutated between the setjmp and longjmp may end up with the old value or the new value depending on where the compiler decided to store it. The documentation does mention this and says that you need to use the volatile keyword to avoid it, but in typical C fashion there's nothing to enforce this, it's just up to the programmer to remember it.
It is extremely uncommon in C codebases because it is extremely dangerous. It makes hazards like pointer arithmetic and manually-terminated strings look like a walk in the park by comparison.
Not that uncommon for a language interpreter? Pretty sure MicroPython does some setjmp/longjmp for non-local returns.
Never use Ruby then.
Ruby even uses goto!
Lua as well
did I skim this correctly that with the mitigation shared this does not (yet) impact fpm-usage and classic CGI (vs. mod_php) is not impacted either?
No, every platform affected.
> Who is at risk: all PHP installations serving web requests, including PHP-FPM, Apache with mod_php, php-cgi, FrankenPHP and LiteSpeed.
https://www.php.net/archive/2026.php#2026-10-21-5
I'm surprised by CGI. The vulnerability description talks about a second request being affected by corrupted state from an earlier request. But I thought CGI only processes one request per process?
Iirc one of the main performance tricks for CGI was to get processes to stay alive.
But there were two vulns - only the second required the two requests.
Despite this coordination, WP-Engine (who's major business is hosting WordPress sites) is still on PHP 8.4.26 a full 2.5 hours after the patch is publicly available.
https://wpenginestatus.com/incidents/969801
Could be backported?
Click the associated tag:
> This commit does not belong to any branch on this repository, and may belong to a fork outside of the repository.
Glorious. Today of all days it would genuinely give me pause for caution.
edit: yeah, really not feeling that: https://github.com/php/php-src/compare/php-8.2.34..php-8.2.3...
Hopefully just a mistake? But looks like a botched release at the least
Same on the older few. I'm not sure I understand it though, seems strange you can have a tag for a commit that's only present in a fork?
Is it perhaps a bit misleading, and only means that there's no branch containing that commit?
Git doesn't have a concept of "fork".
GitHub uses this metaphor, and, as another commenter already aptly described, it could be nothing more than a fancy name for namespaced branches, on the server side.
On the client side, "forks" are usually different repository clones with different remotes and a "coincidentally" shared history.
But you can also map forked repos to multiple remotes of the same repository for example, instead of folders.
Assuming that forks would live in separate clones/blobs on the server is not really based on anything, so I think the warning is a good middle ground between explaining what forks are and how they handle them, and giving actionable advice.
It's also better suited for PR:
"Fork me on GitHub"
vs
"Branch and push your own clone on GitHub, using our shared blob optimizations".
I think the warning is clear and there's nothing misleading about it, but others have already pointed this out and git can be tricky.
It's so good at providing the right level of abstraction to everyone though, it seems!
Similarly, GitHub invented the term "Pull Request" (aka PR, lol).
Not a git-owned term.
But "merge request" isn't a Git primitive either!
And, with Forks and Pull Requesrs, GitHub made a particular workflow in Git approachable to anyone!
I love GitLab, but people get confused by Merges, myself included, so the GH-enabled workflow of favoring ff-only merges, without merge commits, with quadi-linear history, became the norm and helped Git succceed!
But I also appreciate being able to do all kinds of different workflows.
So PRs were positive-sum PR at the time, I'd say. When they became popular, I was still taught Subversion and CVS at uni, alongside Git as "the new thing". Ar that time, many people considered the older systems simpler, and pondered SVN as the most reasonable middle ground between CVS and the decentralized concept of Git!
There is little difference between a tag and a branch in git. There is just the convention that tags reference the same commit forever, while branches move.
On github forks are part of the same physical repository. You could imagine that each logical repository is just a namespace for branches and tags, backed by the same physical repository.
I do consider the warning a bug if github, it should check both tags and branches for commits which are to be considered part of a logical repository.
It can mean either, it's a consequence of how github optimized their backend storage so a 100 forks of a repo initially take up the same space as 0 forks
main (or master) is just another branch to git.
Correct. ..did you mean to reply elsewhere perhaps?
Yes sorry, missed the reply link
Is there a curl command I can use to test if the vulnerability is fully patched on a server (not merely mitigated) without causing any harm?
Note I want it to work with the backports too, not just the latest version.
If LLM's are going to keep finding vulnerabilities of this magnitude, we'll be sure to face a computer worm event of unprecedented scale soon. Best be ready for the moment the lights turn off
Does anyone know how long it takes for the ondrej/php repo to be patched usually?
I installed the updates 18 minutes ago, they're live.
Definitely not available yet, launchpad says last builds are from 2026-10-12
use packages.sury.org instead
follow https://packages.sury.org/php/README.txt
Sury's own website and launchpad description are really misleading as to what to use, thanks for pointing to it
They were because I installed them
Ondrej has already said "deb.sury.org will carry packages as they are built".
https://codeberg.org/oerdnj/deb.sury.org/issues/145#issuecom...
You can see them building here, it looks like most should be ready within the next few minutes:
https://launchpad.net/~ondrej/+archive/ubuntu/php/+builds?bu...
So far Ubuntu LTS isn’t picking up the new packages for me via apt update, and Laravel Forge appears completely unresponsive as a result of being flooded by people trying to update their servers.
And I'm maintaining a box on 18.04 over here, and lo and behold its Pro subscription isn't showing up as active, so I couldn't get the update even if they do release it.
Going to migrate the box to Debian in-place. (Or Gentoo, the way things are currently going.)
Same, I'm spamming the apt update and so far nothing on 22.04 or 24.04 lts
I realised that my linode and ovh vm's point at local mirrors not direct to ubuntu, I guess that's why the delay
Yeah, Linode still hasn't updated their mirror. Vultr has though.
Edit: Linode just updated its mirror.
They had plenty of time to prepare for the release, what a shit show
https://ubuntu.com/security/CVE-2026-109618#status fixes have been back ported in Ubuntu LTS versions just now.
Some have, but others are still showing "needs evaluation", and still no update for 20.04. I've just turned off php for now, as we only used it in a couple of places and won't be missed for a day or two.
Patches have now landed for 20.04 and other earlier Ubuntu versions.
Hard to deploy if you also install extensions from PECL right now (probably slammed).
same here.
`[00:06:03.209] pecl install -f amqp igbinary redis imagick` :sad_face:
Yeah I got repeated error for igbinary (and then find out I didn't use redis in this project and could remove it).
yeah, not surprising but not great
switch to PIE
Is Pie (which I learned about it today) a painless migration from PECL?
My only experience is within Docker images, but yes. Replace the pecl call with the equivalent pie call and you are done.
Disclosure: I'm a PHP core team member and also contributed some code to PIE.
i just took down all my PHP sites for the last few hours. they’re proxied behind Cloudflare so i know there were mitigations, but infrastructure can’t be breached if it isn’t running!
Similar here, except I didn't want to actually shut down the servers, because then I can't patch them! My solution was to just turn off Nginx, which prevents anything from reaching PHP. Then I stuck a caddy server with a temporary config so we get actual 503 maintenance responses.
It seemed to be helpful for others too so I packaged it up, should work on most Nginx / Certbot servers. hopefully its useful: https://github.com/Indemnity83/popcorn
Now I need to get the cute name for a vm vulnerability that attacks offline servers ...
awake2death or something
I once wrote a PoC for reading data off of a dead Open Compute Grand Canyon server that wouldn't boot by sneaking it off of the HDDs through a sideband through the BMC. Never say never.
Has there yet been any signs of any service actually being successfully hacked due to the vulnerability?
I'd expect agents to be hacking hundreds of thousands of websites as we speak.
They'll of course install a backdoor and patch the exploit so others can't come in. They won't deface the website, so there won't be signs.
Watchtowr reports yes, but doesn't say where exactly right now: https://watchtowr.com/intelligence/php-cve-2026-109618-faq/#...
Well they did specify "successfully." EITW is a pretty broad tag, just means attacker are probing servers. I'm not saying it's good but there are usually some pretty big caveats with remote-remote memory corruption, don't know if all the people dooming are aware of that
> Exploit portability and reliability depend on the PHP build, extensions, frontend behavior and allocator layout.
This is the real question here. So much panic right now.
Interview with two of the discoverers: Breaking Down PHP2Shell with Sagi Tzadik (Wiz) & Thai Duong (Calif)
https://www.youtube.com/watch?v=lfEtbrz4-zY
CISA published an advisory half an hour ago:
https://www.cisa.gov/news-events/alerts/2026/10/21/critical-...
>Given the severity of these vulnerabilities, the PHP security team provided minimal source-backports for PHP 7.4, PHP 8.0, and PHP 8.1 to help people building from source or without access to an LTS vendor.
And there were people who thought Project Glasswing was a stunt.
Code example for the exploits https://github.com/david-alvarez-rosa/php-rce
Since I have to go through a bunch of php repos today at work I ended up releasing a CLI tool that automates that process by listing out the steps you need to take to stay away from the vulnerability. Here's the link incase it helps anyone https://github.com/Amsozzer1/php2shell-repo-audit
Dude, today of all days is not when I'm going to trust some random CLI tool that was vibed out. I'm not saying your work isn't helpful, but it would probably be a lot better to just release your prompts you used to build this and let others build it on their own.
I really like the idea of sharing details prompts/specs.
It feels like many times PRs could just be that.
People would be embarrassed of their prompts or they'd be trivially simple.
makes sense, will release the docs. thanks!
I wouldn't listen to him. This is very helpful to people that might be managing dozens or hundreds of servers and need a way to quickly figure out things. It's literally open source and we can point our agent to it and have it examine the source code for anything that looks suspicious first. No need to sit here for a couple hours trying to go back and forth and create something that you already took the time to do. Thanks for the work!
Sury released backports for older versions, as always hes incredibly reliable.
Great that its out but if you depend on pecl for additional extensions and need to rebuild docker container it will probably fail because pecl is having issues for last few hours[1].
[1] https://status.php.net/
It says pecl.php.net recovered but downloading source for extensions ends up with 504 most of the time.
Does anybody know when Amazon Linux 2023 will get this release?
Thread here: https://github.com/amazonlinux/amazon-linux-2023/issues/1148
Is there some reason the biggest company on earth who likely had advanced notice of this cannot put out a patch?
Yeah, really disappointing that they are so slow here, compared to open source maintainers and volunteers.
Looks like the docker images are struggling in the Jenkins queue: https://doi-janky.infosiftr.net/
Versions: 8.2.35 8.3.36 8.4.27 8.5.12
Now are available in the php-src github
can't find it.
Check the tags:
https://github.com/php/php-src/tags
My hosting provider just informed me that they took down my website over this to "protect" me. It's a static website that does not use any php. But it's a generic LAMP hosting provider so they just took down all their hosted websites. I had it on my to do list to migrate that to cloudflare anyway. So, I guess I'll be doing that soonish now.
When every neighbour decides to leave their doors unlocked simultaneously,and the entire world knows it, maybe barricading the village is protecting you
who is your hosting provider ??
...and If you have a server in a closet still running PHP 5 or 7, hosting that project you’ll rewrite “next quarter,” this might buy you some time: https://github.com/analogic/phpsafepass
If open source has these vulnerabilities, imagine proprietary ones.
The best time to code away from PHP was 20 years ago. The next best time is now.
Trying to install this update but it appears that Launchpad doesn’t have the bandwidth for half the world to all update at the same time.
How does this not have a CVSS of 10?
I was under the impression that this sort of bug is fairly common in both php and common php frameworks?
I thought the real lesson was "assume your web server is compromised if you use php, and try to make sure php doesn't touch anything too critical"
I'm struggling to see any reason to use PHP in the first place if it can run without access to private data.
At that point I would not need a backend.
Yes, there have been decades of talk about this already—ensuring you isolate/jail the PHP-related processes and run them with an unprivileged user, etc.
It's usually scripts that can write to /tmp and run unrelated stuff with web user rights. This seems more involved.
Seems like they finally decided to release it after so many people had access. What happened to security as a priority.
I've created patched Dockerfiles for EOL PHP versions. The patch is obtained from official source trees.
I've also published the built images from them to GitHub Registry, but of course it's best to inspect any public repo/docker image before using them blindly.
https://github.com/a-nych/php-eol-backports
One can inspect a GitHub repo sure but how can one usefully inspect a docker image provided by someone on the internet?
Usually by extracting the layers and looking through them. There's dive (https://github.com/wagoodman/dive) for making that easier.
I fail to see how that’s useful. Why would I care about the layers inside an image when I could just extract the entire filesystem inside. Even then it is not useful if we don’t have a culture of reproducible builds.
Fair, "inspect the image" was a bad way to put it.
What I meant was: don't trust prebuilt images from a stranger, including mine. I've provided them just as a convenience, the Dockerfiles and patches can be easily looked-through, and building them yourself is the safer option if you need these docker images.
debian trixie just rolled updates.
Debian always seems to be the grown-ups. I'm a Linux novice so I couldn't get Nvidia drivers working on it but that's the only reason it's not running on my desktops.
Can confirm. Just updated to fixed version
when's bookwarm coming?
packages are building:
https://buildd.debian.org/status/package.php?p=php8.2&suite=...
Already, including backports to 7 and 5.
They have to backport this fix or else leave a large part of the internet broken.
https://github.com/php/php-src/commit/01a40e89fbfc499936e3b0...
What everyone is looking for.
Really makes me appreciate using language with exceptions and not that crazy "manually check if error handling is required - and do it everywhere". The fix adds:
all over the codebase.Gosh. Let's hope they didn't miss a place.
It says "3 days ago". The tag is 2 days old.
I assume it just got pushed?
Yeah… it was patched in the source 3 days ago. Check the linked GHSA.
Why is the official source (php.net) marked as [dupe] https://news.ycombinator.com/item?id=50180943
and not the github mirror?
Have we ever seen the "get ready for a security release tomorrow" email before?
https://www.php.net/archive/2026.php#2026-10-20-1
Many vendors do it, but on a set schedule "patch Tuesday" and some will release vague "mitigation steps" but honestly those usually come with the patch.
I’m not especially technical, but I have clients with WordPress websites. Can anyone perhaps put in a sentence or two what I need to suggest they do?
Tell them to take anything with PHP offline, so that it isn't available from the public internet. That is how Netcup and Contabo are handling Wordpress hosting until they've upgraded all affected packages.
There are already functional exploit scripts on GitHub, you can target any Wordpress site right now.
Shut the sites down until you are able to update to the latest PHP patch for your version.
You need to update the PHP version, which is usually done by the hosting provider.
Just a note to say thank you to all of the above commenters, appreciated
So this only affects 8.2 are other patches coming?
https://www.php.net/archive/2026.php#2026-10-21-5
> PHP 8.5.12, 8.4.27, 8.3.36 and 8.2.35 fix two critical vulnerabilities that can allow unauthenticated remote code execution. All PHP users are strongly encouraged to update immediately.
Earlier versions are not fixed by PHP official and need vendor patching where available
exactly why I asked, because those builds for 8.5.12 are not available yet
I'll give a shoutout to Lithium Hosting. I was able to log in and update my PHP Pool per their custom control panel and switch all of my sites over to the latest fix: 8.5.12.
https://github.com/consocio/php2shell-audit/ GLM 5.3 just wrote it to audit all my php sites. I hope it is useful to you.
there is clearly some drama w.r.t. who takes credit here, 3 companies credited for a single flaw is super odd.
Any signs of exploits out yet?
Time to restart Apache again!
"I'm not a real programmer. I throw together things until it works then I move on. The real programmers will say 'Yeah it works but you're leaking memory everywhere. Perhaps we should fix that.' I’ll just restart Apache every 10 requests." -Rasmus Lerdorf
Amusingly enough restarting php after each request seems to block the issue
If true then classic CGI mode should not be vulnerable, but apparently it is.
Is it? How? Yes, you can get longjmp to do invalid things, but with an ASLR reset each attempt, can you exploit it?
Not sure how, but from the announcement: Who is at risk: all PHP installations serving web requests, including PHP-FPM, Apache with mod_php, php-cgi, FrankenPHP and LiteSpeed.
Maybe just CYA.
Also, CGI PHP skips request cleanup on init failure.
I'm 90% sure CGI can't be exploited this way in default configuration with ASLR and 99% sure if PHP is configured with memory_limit=-1
That said, don't be an idiot and switch to CGI instead of patching. I'm like one of three guys running PHP in CGI mode and I'm vaguely satisfied I have the most resistant configuration.
The reason, BTW, I run PHP in CGI mode is so I can (moral equivalent of) suexec to a locked-down sandboxed environment that limits exploit blast radius. I could do the same with fcgi daemon, but the suexec is stateless, and roundcube doesn't need the performance.
In general, anything stateful or long-lived is just one more thing that can go wrong. One reason why the trend of turning everything into a persistent daemon drives me nuts.
Looks like the upgrade instructions for PHP 8.3 for Fedora 39 and earlier are not working ... yikes.
PHP 8.3.36 (cli) (built: Oct 21 2026 08:18:34) (NTS)
made it in time hopefully
So they've added malloc fail checks and tests for malloc fail throughout.
Is this even reachable on Linux due to overcommit? Maybe by attempting a single extremely large allocation?
PHP is tracking its own memory usage internally with limits configurable via php.ini.
Seems like 4chan is down for maintenance as a result.
This reminds me of the old days when PHP was such a vulnerable language.
By simply searching for websites that used local includes to load other pages, you could get RCE.
At this point, running webapps in JS workers/sandboxes sounds like a good idea. Vendors take care of patching.
Have a search for V8 RCE/CVEs over the past year.
That's why I mentioned vendors. They patch it before announcements.
Also, sandboxing makes automatic exploitation harder. There is no FS persistence, so some checks simply do not pass.
Anyone know when amazon linux 2023 is releasing updates?
Is this why Wikipedia isn't working?
en.wikipedia.org works for me
I think there's a lot to learn from the last twenty four hour's events. An absolute nuclear bomb of an exploit affecting every version of PHP back to 2012 (which nobody should be using of course, but I've worked in plenty of environments that are not up to date).
The thing that's annoyed me the most is the speculation and misinformation, filling in the gaps. Folks looked into the php-src and figured out one of the vulnerabilities, starting saying you should disable certain php settings and then core PHP developers on obscure mailing lists hinting this isn't enough.
Given how inexpensive it is for agents to scan popular OSS projects, disclosure needs to be more discrete and you cannot publish fixes to OSS before disclosure. People will be and are watching for this kind of thing already.
While the fix was not published I genuinely thought a quick service rewrite to some other stack (say Go) would make sense as a fix. (Assuming high integration test coverage )
For those who can’t patch their PHP for a variety of reasons right now, here is a proxy I developed that can sit between nginx or apache and your PHP-FPM, to sanitize inputs and prevent this (and other) attacks:
https://github.com/Qbix/proxy
Thanks for the inspiration! I've stripped down your code and made https://github.com/analogic/phpsafepass which is mostly just filter for fpm
I have this slight suspicion this was not the last critical PHP apocalypse ... :(
Some web-services are back up again here in central Europe, but some are not, which is very annoying. Kind of surprising to see how much PHP is actually used. Hate it or love it, PHP really is very important still - lots of the web depends on it.
This is pure gold. A critical vuln like this is such classic lolphp. Luckily you can port away from PHP pretty easily with AI.
> 8.1 and earlier Not patched: these versions have reached end of life and will not receive an official fix
I would not recommend using PHP. The PHP team keeps breaking backward compatibility and trying to introduce new features instead of focusing on fixing bugs and hardening the compiler.
Do any home router login pages use PHP?
Pretty sure they do yes.
Log4J4PHP
Sucks to be you if you're not on PHP 8 :|
Every year, several of my clients say "We will upgrade next year"
Why they can't publish an expoit so people can run it against their own servers to check the impact?
What I've been feeling lately is that security vulnerabilities will inevitably keep being discovered, and I worry whether humans can ever patch all of them.
This is extremely damning for Cloudflare. I had a bunch of clients telling me Cloudflare is all they need to prevent this, and they want to get that on their site instead of upgrading PHP.
I have not seen confirmation Cloudflare is doing anything except playing whack a mole with certain request patterns. PHP Core Devs have been clear you need to upgrade. If this is true, it's disgustingly opportunistic that Cloudflare is using this critical security time to lie to people that they are safe.
Anyone from Cloudflare want to speak to this?
I'm not from Cloudflare, or particularly a fan of theirs, but they are doing a few things about this, including a new WAF capability: https://blog.cloudflare.com/full-transaction-waf/ and automatic protection for all customers https://blog.cloudflare.com/php-vulnerabilities-waf-protecti...
These were rolled out before the exploit became public.
I would wouldn't describe that as damning.
It's great they are doing mitigations, but they admit themselves, in fine print, that this will not protect you from the vulnerability
Why is word circulating that you can just sign up for Cloudflare and be 100% protected from this? They are burying the leed and trying to get new customers, and it's working.
When log4j came out CF helped a lot. The rules are called stopgap. A TEMPORARY fix. CF added some for this exploit.
The old way of doing things like putting old unpatched stuff behind firewalls is pretty much a dead pattern today.
Hetzner's control panels are PHP. And they're totally unresponsive. Perhaps people storming to manage their services or submit support requests.
Maybe Hetzner know a company that can help out with extra computer resource...? /s
Useless. My fault for paying peanuts
What I did on our WordPress boxes while waiting for distro packages (CVE-2026-109618 / CVE-2026-109619)
1. session.upload_progress.enabled = Off, in php.ini and as php_admin_flag in every FPM pool, so per-directory config can't turn it back on. It's one of the two confirmed consumers in GHSA-6wmf, and the validated FPM path depends on it. Almost nobody uses it, and the advisory suggests leaving it off even after patching.
2. Refuse multipart request bodies at the web server, before PHP parses them. All of the GHSA-w8hw out-of-memory strategies go through multipart parsing. On Apache it's a rewrite rule matching a Content-Type of multipart/form-data that returns 403. On Caddy it's a header matcher that responds 403. The cost: every browser upload breaks (media library, plugin zips, importers). Check your public forms first.
3. Check your SAPI. Both bugs have confirmed RCE against mod_php. FPM is narrower: the validated path needs upload_progress, and the early INI consumer only applies if your front end sends PHP_VALUE/PHP_ADMIN_VALUE. To check, grep your Apache, nginx and Caddy configs for it, and run apache2ctl -M | grep php.
4. pm.max_requests = 1 in the pools. A worker serves one request and exits, which breaks the stale-state chain: the "producer" and "consumer" requests must land on the same worker. It costs a fork per request.
5. Lower max_input_nesting_level and post_max_size, per the advisory.
6. Housekeeping that should already be done: no .php served from uploads directories, and remove any stray phpinfo.php. Scanners request it constantly, and it tells an attacker your exact build.
This is just Claude output. Did you verify anything or just rehash the links?
HN should ban comments that are just Claude output
https://news.ycombinator.com/newsguidelines.html#:~:text=Don...
I’d rather just some sort of tag. Because sometimes it can be useful. This is a case where the community here can scrutinize the output and actually pull out useful data or steps or even starting points when information is coming in so fast for a developing story/issue
The (pretty obviously Claude'd) responses with actual steps you could take to mitigate were 1000% more useful to me than the "SHUT EVERYTHING DOWN WE'RE GONNA DIE" and the "stop posting AI slop" posts were, that's for sure.
It was your response. Of course you prefer your response.
The fact is you had no idea how useful or dangerous your advice was. PHP maintainers said to shut it down, how many people followed your advice instead? Did it work or just leave them vulnerable? Do you know?
Because you're heavily implying that the people who knew about the details of the vulnerability were panicking and thank god we had you with an LLM
It's just Claude output of what I've done; the other URL has the basics.
Why don't you do something useful and rewrite it so it's not claude output any more, but says the same thing in a way that you're satisfied with?
Then your own comment would not be such low effort and useless human slop.
Do you agree or disagree with the comment's claims? Did YOU verify anything? Let's all hear you fact check and proofread and reword what it said so it matches your standards, instead of just listening to you bitch and complain without offering any useful information.
Or do you not actually know anything about PHP administration, programming, and security, so you're only capable of information-free drive-by anti-ai posts, without any other useful content or corrections?
Ball's in your court.
C'mon Ondřej..
it's out?
yup
PHP is done.
People have been saying this for the past 16 years, but the reality is once a system is in production over time it becomes increasingly risky to replace it. Because over the life of a piece of software you make tons of small fixes, resolve bugs, adding customer-specific functionality, etc. that you'd completely overlook when planning our requirements for a rewrite. Which is a big problem when other systems are dependent on the software operating a specific way i.e. APIs, web services, and so forth. Not to mention the economics of a rewrite also has to make sense. Nobody is going to spend 2-3 years recreating what they already had and get no additional functionality out of it. Certain software basically has to get so bad that literally anything replacing it is better than what came before for replacing it to be the right approach.
People shouldn't be using PHP. I was shocked some security focused websites are even using it. I just hope there's nothing of value on their servers and that it's not connected to their internal network in any way. In my experience this is almost always the case because it makes maintenance and development easier but effectively exposes your entire organization to the internet.
That 70% of the internet still uses it is shocking to me. These organizations deserve to get burned badly. Let this incident be a warning to all of them!
PHP is not a particularly insecure language. It’s certainly more secure than something like C or C++. Certain PHP applications are known to have vulnerabilities often, like WordPress.
PHP is a memory-safe language. This vulnerability is a memory safety bug in the VM, which does happen from time to time. It happens with V8 (JS), Java, C#.
List a single language for web development that hasn't had a single RCE vulnerability
Just how debian was done after weak keys, OpenSSL was done after heartbleed, or Windows was done after (rolls dice) the print spooler RCE
And how Crowdstrike was done after their fiasco 2 years ago...
And Lenovo was done after Superfish
Sony after installing a rootkit. (Although they really are dead to me now after paying two noise cancelling headphones of theirs)
Not at all. People will patch and carry on.
always was
always will be
So-- if PHP's sourcecode was unavailable (closed source), would this ever have been found? Probably not. Maybe it is safer to be closed source.
Know how recompilers are porting video games from one platform to another these days? That exact trick works just as well for finding vulnerabilities. Broadly.
1. Hey LLM, turn this binary into source code.
2. Hey LLM, see any glaring security issues with this source code?
You can only do that if you have access to the binary. Which, in a web service, you shouldn't be able to access!
But all the people deploying that binary to their webservers would have access to do that.
So how is PHP being distributed in your funny world? Because I can tell you, even if you put it behind “register with your work email,” whoever seeks the binary will find it.
> Know how recompilers are porting video games from one platform to another these days?
They actually aren't. Most of the claimed cases of "recompilation" are just an emulator packaged into the same binary as the game so you can't tell it's an emulator, or are for projects that already had their source code available (in which case "porting" to WASM is trivial because all of the hard work is done by the people who write your-language-to-WASM compilers, and you just need to do a little bit of work to adjust your toolchain to use it). Everyone just takes slopshit at face value and shares clickbait without actually checking any of the work done. It's infuriating how empowering this software is for liars, honestly.
Can't we fingerprint the code in github and elsewhere and tell AI labs to not do security reviews on the code unless (A) someone is a legitimate security researcher or (B) someone is the owner of the code.
Yeah it sucks, but the alternative could be worse.