RCE in Sigmade Git-Mcp-Server
CVE-2026-4496
A vulnerability was found in sigmade Git-MCP-Server up to 785aa159f262a02d5791a5d8a8e13c507ac42880. Affected by this vulnerability is the function child_process.exec of the file src/gitUtils.ts of the component show_merge_diff/quick_merge_summary/show_file_diff. The manipulation results in os command injection. The attack must be initiated from a local position. The exploit has been made public and could be used. This product operates on a rolling release basis, ensuring continuous delivery. Consequently, there are no version details for either affected or updated releases. It is advisable to implement a patch to correct this issue. The vendor was contacted early about this disclosure but did not respond in any way.
Vulnerability class: Command Injection (OS Command Injection)
EPSS: 0.008 (54.0th percentile) — read the EPSS interpretation.
CVSS v3 metric
CVSS v3 base score 5.3 (Medium). Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:L.
Affected products
- Sigmade Git-mcp-server — versions 785aa159f262a02d5791a5d8a8e13c507ac42880
Weakness classification (CWE)
References
- cna@vuldb.com (technical-description, vdb-entry)
- cna@vuldb.com (signature, permissions-required)
- cna@vuldb.com (third-party-advisory)
- cna@vuldb.com (issue-tracking)
- cna@vuldb.com (exploit)
- cna@vuldb.com (issue-tracking, patch)
- cna@vuldb.com (product)
Frequently asked questions
- What is CVE-2026-4496?
- CVE-2026-4496 is a medium-severity vulnerability in Sigmade Git-Mcp-Server, classified under Command Injection. CVSS score: 5.3/10. Published 2026-03-20.
- How severe is CVE-2026-4496?
- Medium severity. CVSS v3 base score is 5.3 out of 10.