CVE-2026-27735

MEDIUM EPSS 20.4%
Published Feb 26, 20264mo ago · Modified Jun 17, 20261w ago
6.4 CVSS 4.0
Medium
Find Similar
Published Feb 26, 2026 4mo ago
Last Modified Jun 17, 2026 1w ago

Description

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.

CVSS Details

Base Score
6.4
Exploitability
—
Impact
—
Vector string
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/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
Attack Vector Network
Attack Complexity Low
Privileges Required None
User Interaction P
Scope X

Threat Intelligence

EPSS Exploit Probability
20.4% percentile
Exploit & Patch Status
No Known Exploit
Patch Available

Weaknesses 1

CWE-22 Path Traversal Resource Mgmt

Affected Products 1

VendorProductVersionRange
lfprojectsmodel_context_protocol_servers* <2026.1.14

References 2

  • github.com https://github.com/modelcontextprotocol/servers/pull/3164
    Issue TrackingPatch
  • github.com https://github.com/modelcontextprotocol/servers/security/advisories/GHSA-vjqx-cfc4-9h6v
    PatchVendor Advisory

Remediation

  • github.com https://github.com/modelcontextprotocol/servers/pull/3164
    Issue TrackingPatch
  • github.com https://github.com/modelcontextprotocol/servers/security/advisories/GHSA-vjqx-cfc4-9h6v
    PatchVendor Advisory