efforthye/fast-filesystem-mcp · Security
fast-filesystem-mcp is vulnerable to command injection through handleGetDiskUsage function
- GHSA ID
- GHSA-5226-3rvg-hp4x
- CVE ID
- CVE-2026-5327
- Severity
- low
- Published
- Updated
- CVSS
- 6.3 · CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:L
- CVSS v3
- 6.3 · CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:L
- CVSS v4
- 2.1 · CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:L/VI:L/VA:L/SC:N/SI:N/SA:N/E:P
Description
A security flaw has been discovered in efforthye fast-filesystem-mcp up to 3.5.1. The affected element is the function handleGetDiskUsage of the file src/index.ts. Performing a manipulation results in command injection. The attack is possible to be carried out remotely. The exploit has been released to the public and may be used for attacks. The project was informed of the problem early through an issue report but has not responded yet.
CWEs
- CWE-74 · Improper Neutralization of Special Elements in Output Used by a Downstream Component ('Injection')
References
- https://nvd.nist.gov/vuln/detail/CVE-2026-5327 ↗
- https://github.com/efforthye/fast-filesystem-mcp/issues/15 ↗
- https://github.com/efforthye/fast-filesystem-mcp ↗
- https://github.com/user-attachments/files/25822878/fast-filesystem-mcp_bug.pdf ↗
- https://vuldb.com/submit/780776 ↗
- https://vuldb.com/vuln/354658 ↗
- https://vuldb.com/vuln/354658/cti ↗
- https://github.com/advisories/GHSA-5226-3rvg-hp4x ↗