GHSA-j893-m93w-jwjw
Suggest an improvement- Source
- https://github.com/advisories/GHSA-j893-m93w-jwjw
- Import Source
- https://github.com/github/advisory-database/blob/main/advisories/github-reviewed/2026/01/GHSA-j893-m93w-jwjw/GHSA-j893-m93w-jwjw.json
- JSON Data
- https://api.osv.dev/v1/vulns/GHSA-j893-m93w-jwjw
- Aliases
- Published
- 2026-01-07T18:30:26Z
- Modified
- 2026-02-03T03:16:11.034709Z
- Severity
-
- 7.5 (High) CVSS_V3 - CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N CVSS Calculator
- Summary
- fast-filesystem-mcp has a Path Traversal vulnerability
- Details
-
fast-filesystem-mcp version 3.4.0 contains a critical path traversal vulnerability in its file operation tools including fastreadfile. 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.
- Database specific
{ "github_reviewed": true, "nvd_published_at": "2026-01-07T17:16:01Z", "cwe_ids": [ "CWE-24" ], "github_reviewed_at": "2026-01-08T17:18:26Z", "severity": "HIGH" }- References
Affected packages
npm / fast-filesystem-mcp
Package
- Name
- fast-filesystem-mcp
- View open source insights on deps.dev
- Purl
- pkg:npm/fast-filesystem-mcp