CVE-2025-53109

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

Description

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.

Category

7.3
CVSS
Severity: High
CVSS 4.0 •
EPSS 0.06%
Affected: modelcontextprotocol servers
Published at:
Updated at:

References

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

Frequently Asked Questions

What is the severity of CVE-2025-53109?
CVE-2025-53109 has been scored as a high severity vulnerability.
How to fix CVE-2025-53109?
To fix CVE-2025-53109, make sure you are using an up-to-date version of the affected component(s) by checking the vendor release notes. As for now, there are no other specific guidelines available.
Is CVE-2025-53109 being actively exploited in the wild?
As for now, there are no information to confirm that CVE-2025-53109 is being actively exploited. According to its EPSS score, there is a ~0% probability that this vulnerability will be exploited by malicious actors in the next 30 days.
What software or system is affected by CVE-2025-53109?
CVE-2025-53109 affects modelcontextprotocol servers.
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