CVE-2025-67366: Path traversal via symlinks in @sylphxltd/filesystem-mcp v0.5.8
Version 0.5.8 of the @sylphxltd/filesystem-mcp MCP server contains a path traversal vulnerability in its read_content tool, where path validation occurs before symlink resolution. Attackers can use symlinks inside an allowed directory to read files outside the intended scope.
Disclosed 7 January 2026 · Record updated 13 September 2026
Impact
Unauthorised read access to files outside the MCP server's permitted directories, bypassing directory restrictions.
Our coverage
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Sources
- nvd.nist.govhttps://nvd.nist.gov/vuln/detail/CVE-2025-67366
