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  4. CVE 2026 85626 git mcp server 2151 argument injection via git
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Back to active CVEs
High · CVSS 8.7CVE-2026-85626

git-mcp-server 2.15.1 Argument Injection via Git Ref ParametersCVE-2026-85626

Answer in brief

CVE-2026-85626 records a High severity (CVSS 8.7) vulnerability in git-mcp-server 2.15.1 Argument Injection via Git Ref Parameters. The current sources do not mark it as known exploited. The current feed maps cyanheads/git-mcp-server (generic), cyanheads/git-mcp-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 4, 2026Updated Oct 1, 2026Source checked Oct 25, 2026First seen by HOL Sep 4, 2026Material review Oct 1, 2026
Upstream Advisory

Record context

Vulnerability class
Tool Poisoning
EPSS
Not reported
CWE IDs
CWE-88
Source
CVE List V5
Source checked
Oct 25, 2026
References
5 linked sources
Open source record

Key facts

Risk
High · CVSS 8.7
Exploitation
Not marked as known exploited
Affected software
2 mapped packages or products
Fix availability
Not reported

Why this deserves its current priority

CVSS is 8.7. 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 cyanheads/git-mcp-server (generic), cyanheads/git-mcp-server (generic). Check affected ranges and fixed versions before updating.

Mapped affected packages and fixed versions
PackageAffected rangeFixed version
cyanheads/git-mcp-servergeneric0Not reported
cyanheads/git-mcp-servergeneric>=0 <=2.15.3Not reported

Recommended response

  1. 1Check inventory. Check lockfiles and deployed manifests for cyanheads/git-mcp-server, cyanheads/git-mcp-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 4, 2026

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

  2. Source modified

    Oct 1, 2026

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

  3. First seen by HOL

    Sep 4, 2026

Sources and claim methodology

  • GitHub security advisorygithub.com
  • GitHub security advisorygithub.com
  • GitHub security advisorygithub.com
  • GitHub security advisorygithub.com
  • Source referencevulncheck.com
Upstream source description

git-mcp-server 2.15.1 contains an argument injection vulnerability in the ref and object parameters of git_log, git_diff, and git_show tools that lack leading-dash validation. Attackers can inject git command-line options like --output= to write files outside the repository to arbitrary paths accessible by the process.

Quoted source text, attributed separately from HOL analysis.