Description

fast-filesystem-mcp version 3.4.0 contains a critical path traversal vulnerability in its file operation tools including fast_read_file. This vulnerability arises from improper path validation that fails to resolve symbolic links to their actual physical paths. The safePath and isPathAllowed functions use path.resolve() which does not handle symlinks, allowing attackers to bypass directory access restrictions by creating symlinks within allowed directories that point to restricted system paths. When these symlinks are accessed through valid path references, the validation checks are circumvented, enabling access to unauthorized files.

INFO

Published Date :

2026-01-07T00:00:00.000Z

Last Modified :

2026-01-07T16:57:14.806Z

Source :

mitre
AFFECTED PRODUCTS

The following products are affected by CVE-2025-67364 vulnerability.

Vendors Products
Efforthye
  • Fast-filesystem-mcp
REFERENCES

Here, you will find a curated list of external links that provide in-depth information to CVE-2025-67364.

CVSS Vulnerability Scoring System

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