CVE-2026-19118

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, 3.21.5, and 3.22.0. This vulnerability was reported via the GitHub Bug Bounty program.

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Weakness Type (CWE)

CWE-367 CWE-367

References

Other References

https://docs.github.com/en/[email protected]/admin/release-notes#3.17.20 https://docs.github.com/en/[email protected]/admin/release-notes#3.18.14 https://docs.github.com/en/[email protected]/admin/release-notes#3.19.11 https://docs.github.com/en/[email protected]/admin/release-notes#3.20.7 https://docs.github.com/en/[email protected]/admin/release-notes#3.21.5

Frequently Asked Questions

What is CVE-2026-19118? +

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, 3.21.5, and 3.22.0. This vulnerability was reported via the GitHub Bug Bounty program.

How do I check if I'm vulnerable to CVE-2026-19118? +

You can use Secably's free Website Scanner to check your website for known vulnerabilities. For infrastructure scanning, use the Port Scanner to identify exposed services that may be affected. Check the vendor advisories linked above for specific patch and version information.

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