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High · CVSS 7.5CVE-2026-19118

Race condition vulnerability was identified in GitHub Enterprise Server that allowed remote code executionCVE-2026-19118

Answer in brief

CVE-2026-19118 records a High severity (CVSS 7.5) vulnerability in Race condition vulnerability was identified in GitHub Enterprise Server that allowed remote code execution. The current sources do not mark it as known exploited. The current feed maps GitHub/Enterprise Server (generic), GitHub/Enterprise Server (generic). Check affected ranges and fixed versions before updating.

Analysis pending evidence review

HOL Guard separates source facts from reviewed analysis. See the methodology.

Published Sep 1, 2026Updated Sep 8, 2026Source checked Oct 17, 2026First seen by HOL Sep 1, 2026Material review Sep 8, 2026
Upstream Advisory

Record context

Vulnerability class
RCE
EPSS
Not reported
CWE IDs
CWE-367
Source
CVE List V5
Source checked
Oct 17, 2026
References
5 linked sources
Open source record

Key facts

Risk
High · CVSS 7.5
Exploitation
Not marked as known exploited
Affected software
3 mapped packages or products
Fix availability
Not reported

Why this deserves its current priority

CVSS is 7.5. The current sources do not mark it as known exploited. Treat this as a source-backed prioritization signal, not a statement about your environment.

Analysis status

Analysis pending evidence review

Factual feed record only; HOL analysis is not approved for indexing. Read the methodology.

Affected scope and exposure questions

The current feed maps GitHub/Enterprise Server (generic), GitHub/Enterprise Server (generic). Check affected ranges and fixed versions before updating.

Affected products and reported versions
ProductAffected versionsFixed versions
cpe:2.3:a:github:enterprise_server:*:*:*:*:*:*:*:*Not reportedNot reported
Mapped affected packages and fixed versions
PackageAffected rangeFixed version
GitHub/Enterprise Servergeneric>=3.17.0 <=3.17.19 || >=3.18.0 <=3.18.13 || >=3.19.0 <=3.19.10 || >=3.20.0 <=3.20.6 || >=3.21.0 <=3.21.4Not reported
GitHub/Enterprise Servergeneric3.17.0 || 3.18.0 || 3.19.0 || 3.20.0 || 3.21.0Not reported

Recommended response

  1. 1Check inventory. Check lockfiles and deployed manifests for GitHub/Enterprise Server, GitHub/Enterprise Server.
  2. 2Review the reported fix. Monitor this advisory for an available fix and review any installs of the affected package.

Evidence timeline and material changes

  1. Published upstream

    Sep 1, 2026

    Evidence: source:cvelist:source_dates:source-dates:record

  2. Source modified

    Sep 8, 2026

    Evidence: source:cvelist:source_dates:source-dates:record

  3. First seen by HOL

    Sep 1, 2026

Sources and claim methodology

  • GitHub security advisorydocs.github.com
  • GitHub security advisorydocs.github.com
  • GitHub security advisorydocs.github.com
  • GitHub security advisorydocs.github.com
  • GitHub security advisorydocs.github.com
Upstream source 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.

Quoted source text, attributed separately from HOL analysis.

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