If GH is getting RCE's this late in the game who wants to take the chance something else won't?
As much as I'd like to believe that I'm worthy, I'm not.
Eh, if you want to be able to continue working, deploy and what not as normal during weekdays, I'd suggest also moving to Forgejo Actions if you're moving anyways. Not 100% compatible, but more or less the same, and even paying the same but with dedicated hardware you'd get way faster runners.
I was pleasantly shocked that Forgejo is literally a single binary with a relatively easy config. All my internal services reference my Forgejo instance so, if I need to bail on GitHub, it's low friction for me.
The all-in-docker image and a couple of gitlab runners is all small to medium sized teams need. (Don't overcomplicate it with the kubernetes version unless you really need it)
https://status.gitlab.com/pages/history/5b36dc6502d06804c083...
> GitHub Enterprise Server customers should upgrade immediately - at the time of this writing, our data indicates that 88% of instances are still vulnerable
> Upgrade to GHES version 3.19.3 or later
https://docs.github.com/en/enterprise-server@3.19/admin/rele... :
> Enterprise Server 3.19.3 - March 10, 2026
88% of on-prem customers haven't applied a critical security fix from 7 weeks ago, that seems ... bad.
They are constantly telling all their GHES customers who complain about the severe flaws with the self-hosted appliance product to move to GitHub Enterprise Cloud, which is just regular GitHub.com, but who in their right mind would make that move nowadays??? At least GHES stays up during the daily github.com outages.
It's still a pretty annoying process, though.
Any public instance should update immediately though, it's not very hard to put together how to repro the vulnerability on your own from what they provide in the article and the fact that GitHub Enterprise source is publicly available.
Guess which is usually picked ...
"Trusted by more than 50% of Fortune 100 companies".
You choose to give your most precious data and the keys of infrastructure whose job was to steal information and with people that are still NSA/8200 employees.
Don't be surprised if one day they are compelled to share data or find dirt on people (they protect one well known LLM company).
It doesn't mean they are doing it, but clearly the incentive for it exists, + you are exposed to both US and IL jurisdictions risk.
And yet when I do something a bit dodgy (like query a DC with a cli, and reset credentials) it's silent...
Also, this was about as bad as a vulnerability can get. It’s not exaggerating to say that all private code on GitHub should be considered compromised because of this issue. An anonymous user could have read every single private repo. To me, that warrants BREAKING.
Another data point against doing security through obscurity.
Security research historically has two difficult components that build on one another: 1. Understanding complex system internals: uncovering the inner workings hidden by abstractions or interfaces 2. Finding vulnerabilities in these uncovered mechanisms
Sometimes both steps are equally hard. But often, finding the vulnerability is trivial once the real mechanisms are uncovered, rather than relying on assumptions about inner workings.
CVE-2026-3854 is a case where the vulnerability is not plainly obvious after understanding the internals. Still, I am confident that this command injection would have been found quickly had it been exposed to a more traditional or accessible attack surface.
But recently this signal got somewhat scrambled, or being sabotage by c++ fan boys (those coding AIs would help getting rid of dev/vendor lock-ing using c++ syntax complexity)
I know it's easy to say after the fact but still, wtf
> babeld copies git push option values directly into the X-Stat header - without sanitizing semicolons. Since ; is the X-Stat field delimiter, any semicolon in a push option value breaks out of its designated field and creates new, attacker-controlled fields.
They managed to literally do the simplest possible thing wrong. The fruit was hanging so low it might have been underground.
And yet another lesson to not treat data as instructions. Sanitize all user input!
As we have known for a while, they ended up being really good at translating source to source or text to source. It shouldn't be too surprising they are also really good at understanding the asm version too.
Doesn't make it any less impressive, but maybe less surprising.
edit: I didn't mean it as a put-down of either the article or how they found the vulnerability, but it wasn't a constructive comment either way.
