# CVE-2026-85626

## Summary

- **CVE ID:** CVE-2026-85626
- **Severity:** HIGH
- **CVSS Score:** 8.7 (CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:H/VA:N/SC:N/SI:N/SA:N)
- **CWE:** CWE-88
- **Published:** Sep 4, 2026
- **Last Modified:** Sep 8, 2026

## 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 (0)

## References

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

## Exploitation Prediction (EPSS)

- **EPSS Score:** 0.27%
- **EPSS Percentile:** 19.0

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_Exported from OnDuty AI Vulnerability Intelligence on 2026-09-11._