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.
Affected products
github: enterprise server
References5
- docs.github.com/en/[email protected]/admin/release-notes#3… Release NotesVendor Advisory
- docs.github.com/en/[email protected]/admin/release-notes#3… Release NotesVendor Advisory
- docs.github.com/en/[email protected]/admin/release-notes#3… Release NotesVendor Advisory
- docs.github.com/en/[email protected]/admin/release-notes#3… Release NotesVendor Advisory
- docs.github.com/en/[email protected]/admin/release-notes#3… Release NotesVendor Advisory
Metrics
- CVSS 3.1
-
7.5
HIGH
Score source: NVD
CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H - CVSS 4.0
-
7.7
HIGH
Score source: CNA
CVSS:4.0/AV:N/AC:L/AT:P/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X - EPSS — exploit probability
- 1% percentile: 60 · as of 8 November 2026
- CWE
- CWE-367
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