CVE-2026-27735 MEDIUM

CVE-2026-27735: mcp-server-git : Path traversal in git_add allows staging files outside repository boundaries

Vendor Modelcontextprotocol
Product servers
Weakness CWE-22 · Path traversal
Published February 25, 2026
Last update February 26, 2026

CVSS base score

6.4/10
Attack vector Network
Attack complexity Low
Privileges required None
User interaction
Confidentiality
Integrity

CVSS vector

CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:P/VC:N/VI:N/VA:N/SC:H/SI:H/SA:N

What the vulnerability does

01Description

Model Context Protocol Servers is a collection of reference implementations for the model context protocol (MCP). In mcp-server-git versions prior to 2026.1.14, the git_add tool did not validate that file paths provided in the files argument were within the repository boundaries. Because the tool used GitPython's repo.index.add() rather than the Git CLI, relative paths containing `../` sequences that resolve outside the repository were accepted and staged into the Git index. Users are advised to upgrade to 2026.1.14 or newer to remediate this issue.

Key dates

02Disclosure timeline

February 25, 2026 CVE published
February 26, 2026 Record updated