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TI-2025-41197 Aliases CVE-2025-67364GHSA-j893-m93w-jwjw

fast-filesystem-mcp version 3.4.0 contains a critical path traversal vulnerability in its…

Priority HIGH 72CWE-24Published · Updated

Key facts

Attack vector
Network
Privileges required
None
User interaction
None
Attack complexity
Low
Impact type
—
Confidentiality · integrity · availability
High · None · None
Fix status
No fix listed

Attack profile from CVSS 3.1 · CISA ADP. Fix status from CNA and GitHub.

Summary

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.

Why it matters now

Exploitation Proof of concept CISA SSVC · not in CISA KEV
EPSS 0.00634 50th percentileScored 2026-11-07
Public exploit Yes 1 exploit referenceTagged by NVD
Fix No fix listed No fixed version in the sources yet

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation
Poc
Automatable
Yes
Technical impact
Partial

The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.

Affected products

VendorProductAffected versionsFixed inStatusSource
——all versions—No fix listedCNA
—fast-filesystem-mcp (npm)up to 3.4.0—No fix listedGHSA-j893-m93w-jwjw
  • — Vendor— Affected all versions Fixed in — No fix listed CNA
  • fast-filesystem-mcp (npm) Vendor— Affected up to 3.4.0 Fixed in — No fix listed GHSA-j893-m93w-jwjw

CPE configurations NVD · 1

CPEVersionsRoleVendor
cpe:2.3:a:efforthye:fast-filesystem-mcp:3.4.0:*:*:*:*:*:*:*3.4.0Vulnerableefforthye
  • cpe:2.3:a:efforthye:fast-filesystem-mcp:3.4.0:*:*:*:*:*:*:* Versions 3.4.0 Vulnerable ·efforthye

Remediation

No fixed version listed by the sources yet.

Timeline

  1. 2026-10-02 Threatist record created from CVE-2025-67364
  2. 2026-10-03 Alias added: GHSA-j893-m93w-jwjw
  3. 2026-10-25 EPSS moved to the 50th–90th percentile

References

Exploit 1

Advisory 1

Other 1

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences