CVE-2026-19118 Race condition vulnerability was identified in GitHub Enterprise Server that allowed remote code execution
Authenticated users with write access can achieve remote code execution via a race condition in concurrent upload requests.
- Exploited in the wild
- Not known
- Login needed
- Any signed-in user
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2026-19118?
CVE-2026-19118 is a high-severity vulnerability in Github Enterprise Server, published on 1 Sep 2026. Any signed-in user can exploit it over the network, with no action from the victim.
Official description
A time-of-check time-of-use race condition vulnerability was identified in GitHub Enterprise Server that allowed remote code execution. Exploitation required an authenticated user with write access to a repository and precise timing of concurrent upload requests. This vulnerability affected all versions of GitHub Enterprise Server prior to 3.22 and was fixed in versions 3.17.20, 3.18.14, 3.19.11, 3.20.7, and 3.21.5. This vulnerability was reported via the GitHub Bug Bounty program.
Weakness: CWE-367
Which versions are affected by CVE-2026-19118?
It affects 1 product.
Products include Github Enterprise Server.
How do I fix CVE-2026-19118?
No fix has been published for CVE-2026-19118 yet. Limit exposure of the affected software until one is available.
Is CVE-2026-19118 being exploited?
There is no known exploitation of CVE-2026-19118 in the wild and no public exploit code.
Other vulnerabilities in Github Enterprise Server
- CVE-2024-4985 Auth bypass in Enterprise Server
- CVE-2022-23739 Missing authorization in GitHub Enterprise Server
- CVE-2022-46255 Improper Limitation of a Pathname to a Restricted Directory in GitHub Enterprise Server leading to RCE
- CVE-2021-22869 Improper access control in GitHub Enterprise Server allows self-hosted runners to execute outside their control group
- CVE-2024-9487 Auth bypass in Enterprise Server
Sources
Also known as GHSA-4fq5-hf84-xr75.