CVE-2026-19118

Race condition vulnerability was identified in GitHub Enterprise Server that allowed remote code execution

Published: Sep 1, 2026Updated: Sep 8, 2026 Sources: CVE List NVDCWE-367

7.5HIGH

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.

No summary for this CVE yet.

CVSS Vector Breakdown

Exploitability

AV:NAttack Vector

Network

AC:HAttack Complexity

High

PR:LPrivileges Required

Low

UI:NUser Interaction

None

Scope

S:UScope

Unchanged

Impact

C:HConfidentiality

High

I:HIntegrity

High

A:HAvailability

High

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Weaknesses

CWE-367

Affected Products

GitHub

commercial·US

Enterprise Server

DevTools & CI

and 1 more affected products View all →

Exploitability

Official Patch Available

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Attack Graph

Products CVE Techniques Tactics

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MITRE ATT&CK

1 technique

Privilege Escalation

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References

https://docs.github.com/en/enterprise-server@3.17/admin/release-notes#3.17.20

docs.github.com

https://docs.github.com/en/enterprise-server@3.18/admin/release-notes#3.18.14

docs.github.com

https://docs.github.com/en/enterprise-server@3.19/admin/release-notes#3.19.11

docs.github.com

and 2 more references View all →

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