What is GHSA-q66q-fx2p-7w4m?

GHSA-q66q-fx2p-7w4m is a security advisory published by GitHub Security Advisories with High severity. @modelcontextprotocol/server-filesystem allows for path validation bypass via prefix matching and symlink handling

Which CVE IDs does GHSA-q66q-fx2p-7w4m cover?

GHSA-q66q-fx2p-7w4m covers the following CVE IDs: CVE-2025-53109. Each CVE has its own detail page on EchelonGraph Pulse with the synthesized EG score.

Which products are affected by GHSA-q66q-fx2p-7w4m?

GHSA-q66q-fx2p-7w4m affects 2 products, including: npm/@modelcontextprotocol/server-filesystem:\u003c= 0.6.2; npm/@modelcontextprotocol/server-filesystem:\u003e= 2025.1.14, \u003c 2025.7.1.

GHSA-q66q-fx2p-7w4mHigh

@modelcontextprotocol/server-filesystem allows for path validation bypass via prefix matching and symlink handling

Vendor

GitHub Security Advisories

Published

July 1, 2025

Last Modified

July 2, 2025

🔗 CVE IDs covered (1)

CVE-2025-53109 →

📋 Description

Versions of Filesystem prior to 0.6.3 & 2025.7.1 could allow access to unintended files via symlinks within allowed directories. Users are advised to upgrade to 2025.7.1 to resolve.

Thank you to Elad Beber (Cymulate) for reporting these issues.

🎯 Affected products2

npm/@modelcontextprotocol/server-filesystem:<= 0.6.2
npm/@modelcontextprotocol/server-filesystem:>= 2025.1.14, < 2025.7.1

🔗 References (4)

https://github.com/modelcontextprotocol/servers/security/advisories/GHSA-q66q-fx2p-7w4m
https://github.com/modelcontextprotocol/servers/commit/d00c60df9d74dba8a3bb13113f8904407cda594f
https://nvd.nist.gov/vuln/detail/CVE-2025-53109
https://github.com/advisories/GHSA-q66q-fx2p-7w4m