CVE-2025-67366

HIGH 7.5CVE-2025-67366 · Published 07/01/2026 · updated 04/11/2026

In short

CVE-2025-67366 is a HIGH (CVSS 7.5) vulnerability affecting filesystem mcp (sylphx).
Chance of exploitation in the next 30 days (EPSS): 0.62%, higher than 50.2% of all vulnerabilities.
No patched version is listed yet: follow the vendor's advisory in References.

Package	Affected versions	Patched versions
filesystem mcp sylphx	`= 0.5.8`	No fix yet

Description

@sylphxltd/filesystem-mcp v0.5.8 is an MCP server that provides file content reading functionality. Version 0.5.8 of filesystem-mcp contains a critical path traversal vulnerability in its "read_content" tool. This vulnerability arises from improper symlink handling in the path validation mechanism: the resolvePath function checks path validity before resolving symlinks, while fs.readFile resolves symlinks automatically during file access. This allows attackers to bypass directory restrictions by leveraging symlinks within the allowed directory that point to external files, enabling unauthorized access to files outside the intended operational scope.

References

sylphxltd/filesystem-mcp · Product
sylphxltd/filesystem-mcp · Exploit

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