CVE-2025-67366 Path traversal in n/a
Attackers can read arbitrary files outside the allowed directory by exploiting symlink handling flaws in the filesystem MCP server.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2025-67366?
CVE-2025-67366 is a high-severity path traversal vulnerability in n/a, published on 7 Jan 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official 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.
Weakness: CWE-23
Which versions are affected by CVE-2025-67366?
It affects 1 product.
Products include Sylphx Filesystem Mcp.
How do I fix CVE-2025-67366?
No fix has been published for CVE-2025-67366 yet. Limit exposure of the affected software until one is available.
Upgrade, and resolve every user-supplied path against an allowed base folder before opening it. More about Path traversal.
Is CVE-2025-67366 being exploited?
It is not confirmed as exploited in the wild, but public exploit code for CVE-2025-67366 exists.
Sources
Also known as GHSA-77jm-6qr9-xf3j.