What’s Vulnerable › Vulnerabilities

CVE-2026-85626: git-mcp-server 2.15.1 Argument Injection via Git Ref Parameters

• Severity: high (CVSS 7.5 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.5% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2026-09-04 · updated 2026-09-23
• Weakness: CWE-88

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.

Affected products

• cyanheads git-mcp-server: through 2.15.3

References

• https://github.com/cyanheads/git-mcp-server
• https://github.com/cyanheads/git-mcp-server/blob/v2.15.3/src/services/git/providers/cli/operations/commits/log.ts
• https://github.com/cyanheads/git-mcp-server/blob/v2.15.3/src/services/git/providers/cli/utils/command-builder.ts
• https://github.com/cyanheads/git-mcp-server/issues/53
• https://www.vulncheck.com/advisories/git-mcp-server-2.15.1-argument-injection-via-git-ref-parameters
• https://github.com/cyanheads/git-mcp-server/issues/53

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