CVE-2025-67364

CVE-2025-67364 is a high-severity vulnerability in Efforthye Fast-filesystem-mcp with a CVSS 3.x base score of 7.5. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-24.

Key facts

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.

Frequently asked questions

What is CVE-2025-67364?
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.
How severe is CVE-2025-67364?
CVE-2025-67364 has a CVSS 3.x base score of 7.5, rated high severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity none, and availability none.
Is CVE-2025-67364 being actively exploited?
It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (44th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2025-67364?
CVE-2025-67364 affects Efforthye Fast-filesystem-mcp. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2025-67364?
Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.
Does CVE-2025-67364 have an EU (EUVD) identifier?
Yes. CVE-2025-67364 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-1195.
When was CVE-2025-67364 published?
CVE-2025-67364 was published on 2026-01-07 and last updated on 2026-06-17.

References

Affected products (1)

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