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CVE-2026-27735

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

Published: Feb 25, 2026Updated: Apr 14, 2026 Sources: CVE List NVD GHSACWE-22
NVD MITRE
6.5CVSSMEDIUM
EPSS Score
0.3%
Top 79.8%
CISA KEV
Not in KEV
Exploits
No Known Exploits
Remediation
Patch Available

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 Vector Breakdown

AV:NAC:LPR:NUI:RS:UC:HI:NA:N
Exploitability
AV:NAttack Vector
Network
AC:LAttack Complexity
Low
PR:NPrivileges Required
None
UI:RUser Interaction
Required
Scope
S:UScope
Unchanged
Impact
C:HConfidentiality
High
I:NIntegrity
None
A:NAvailability
None
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Weaknesses

CWE-22

Affected Products

model context protocol serverslfprojects
Mixed
AI / ML / notebook-mlops
mcp-server-gitPyPIOSS Libraries
serversmodelcontextprotocol
Mixed
AI / ML / ai-agent-tooling
lfprojectsoss-projectAI / MLaka mlflow, valkey, model context protocol servers, mcp servers
pypipackage-ecosystemOSS Libraries
modelcontextprotocoloss-projectAI / MLaka mcp, model context protocol

Attack Graph

Products CVE Techniques Tactics

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Exploitability

Official Patch Available

MITRE ATT&CK

2 techniques
Collection
Discovery
View detailed technique mapping

References

https://github.com/modelcontextprotocol/servers/pull/3164
github.com
https://github.com/modelcontextprotocol/servers/security/advisories/GHSA-vjqx-cfc4-9h6v
github.com
https://nvd.nist.gov/vuln/detail/CVE-2026-27735
nvd.nist.gov
and 2 more references View all →

Timeline

Published
Feb 25, 2026
Last Updated
Apr 14, 2026

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