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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History

Tue, 01 Sep 2026 23:45:00 +0000

Type Values Removed Values Added
First Time appeared Github
Github enterprise Server
Vendors & Products Github
Github enterprise Server

Tue, 01 Sep 2026 22:00:00 +0000

Type Values Removed Values Added
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.
Title Race condition vulnerability was identified in GitHub Enterprise Server that allowed remote code execution
Weaknesses CWE-367
References
Metrics cvssV4_0

{'score': 7.7, 'vector': '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'}


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cve-icon MITRE

Status: PUBLISHED

Assigner: GitHub_P

Published:

Updated: 2026-09-01T21:55:04.441Z

Reserved: 2026-08-06T14:46:19.378Z

Link: CVE-2026-19118

cve-icon Vulnrichment

No data.

cve-icon NVD

Status : Received

Published: 2026-09-01T22:17:11.010

Modified: 2026-09-01T22:17:11.010

Link: CVE-2026-19118

cve-icon Redhat

No data.

cve-icon OpenCVE Enrichment

Updated: 2026-09-01T23:30:05Z

Weaknesses