CVE-2026-19118High· 7.5▾ TwilightA 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 c…
▾ Twilight zone — High severity, or a signal on a lesser flaw
impact 41.3 · likelihood 0.2 · exploitation 0
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Exploit-prediction probability, daily snapshots since Sep 8.
Disclosure to exploitation, from the record and what we observed since indexing it.
Disclosed via NVD
Last analysed / modified upstream
0.4%
0.4% → 0.9%
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.
enterprise_server < 3.17.20enterprise_server >= 3.18.0, < 3.18.14enterprise_server >= 3.19.0, < 3.19.11enterprise_server >= 3.20.0, < 3.20.7enterprise_server >= 3.21.0, < 3.21.5Upgrade past the affected range:
enterprise_server 3.21.5Connected by shared product, vendor, weakness, or advisory.
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