# fast-filesystem-mcp (npm) vulnerabilities

2 known vulnerabilities (1 high, 1 medium), with the versions each affects and the releases that fix them.

## At a glance

- Latest release: 3.5.2 (May 2, 2026): no advisory affects it
- Newest unaffected release: 3.5.2 (May 2, 2026), the latest release
- Weekly downloads: 269
- Dependents: 0
- Releases: 48 since 2.1.0 (Aug 14, 2025)
- Registry: https://www.npmjs.com/package/fast-filesystem-mcp
- Releases read: Nov 8, 2026

## Version timeline

Affected versions per advisory, in version order:

- CVE-2026-5327: 2.1.0 to 3.5.0 (3.5.2 is outside it)
- CVE-2025-67364: 2.1.0 to 3.4.0 (3.5.0 is outside it)

## Advisories (2)

### [CVE-2026-5327](https://cve.now/CVE-2026-5327): efforthye fast-filesystem-mcp index.ts handleGetDiskUsage command injection

- Severity: Medium 5.3
- Published: Apr 2, 2026
- Affected: through 3.5.0.
- Fixed in 3.5.2 (released May 2, 2026, 30 days after disclosure), the first release outside every affected range (no listed fixed version clears them all).
- The latest release, 3.5.2, is not affected.
- 47% of fast-filesystem-mcp downloads last week were affected versions (93).

### [CVE-2025-67364](https://cve.now/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.

- Severity: High 7.5
- Published: Jan 7, 2026
- Affected: through 3.4.0.
- Fixed in 3.5.0 (released Sep 24, 2025, 105 days before disclosure), the first release outside every affected range (no listed fixed version clears them all).
- The latest release, 3.5.2, is not affected.
- 18% of fast-filesystem-mcp downloads last week were affected versions (36).

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