modelcontextprotocol/servers · Security
@modelcontextprotocol/server-filesystem allows for path validation bypass via prefix matching and symlink handling
- GHSA ID
- GHSA-q66q-fx2p-7w4m
- CVE ID
- CVE-2025-53109
- Severity
- high
- Published
- Updated
- CVSS v4
- 7.3 · CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:P/VC:N/VI:N/VA:H/SC:H/SI:H/SA:H
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.
CWEs
- CWE-59 · Improper Link Resolution Before File Access ('Link Following')