CVE-2025-53109

Model Context Protocol Servers Vulnerable to Path Validation Bypass via Prefix Matching and Symlink Handling

CVSS 7.3 HIGHEPSS 0.7%CWE-59

Model Context Protocol Servers is a collection of reference implementations for the model context protocol (MCP). Versions of Filesystem prior to 0.6.4 or 2025.7.01 could allow access to unintended files via symlinks within allowed directories. Users are advised to upgrade to 0.6.4 or 2025.7.01 resolve.

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

Affected products

modelcontextprotocol · servers

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References

https://github.com/modelcontextprotocol/servers/commit/d00c60df9d74dba8a3bb13113f8904407cda594f https://github.com/modelcontextprotocol/servers/security/advisories/GHSA-q66q-fx2p-7w4m