CVE-2026-7400 geekgod382 filesystem-mcp-server read_file_tool/write_file_tool server.py is_path_allowed path traversal
A path traversal vulnerability in the filesystem MCP server allows remote attackers to read or modify arbitrary files outside the intended directory.
- 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-2026-7400?
CVE-2026-7400 is a medium-severity path traversal vulnerability in geekgod382 filesystem-mcp-server, published on 29 Apr 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official description
A security vulnerability has been detected in geekgod382 filesystem-mcp-server 1.0.0. This issue affects the function is_path_allowed of the file server.py of the component read_file_tool/write_file_tool. Such manipulation leads to path traversal. The attack can be launched remotely. The exploit has been disclosed publicly and may be used. Upgrading to version 1.1.0 is capable of addressing this issue. The name of the patch is 45364545fc60dc80aadcd4379f08042d3d3d292e. Upgrading the affected component is advised.
Weakness: CWE-22
Which versions are affected by CVE-2026-7400?
How do I fix CVE-2026-7400?
No fix has been published for CVE-2026-7400 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-2026-7400 being exploited?
It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-7400 exists.
Sources
Also known as GHSA-wgg9-6667-c9w2.