RCE in Efforthye Fast-filesystem-mcp
CVE-2026-5327
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 possi…
EPSS: 0.015 (81.6th percentile) — read the EPSS interpretation.
CVSS v3 metric
CVSS v3 base score 6.3 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:L.
Affected products
- Efforthye Fast-filesystem-mcp — versions 3.5.0, 3.5.1
Weakness classification (CWE)
References
- VDB-354658 | efforthye fast-filesystem-mcp index.ts handleGetDiskUsage command injection (technical-description, vdb-entry)
- VDB-354658 | CTI Indicators (IOB, IOC, TTP, IOA) (signature, permissions-required)
- Submit #780776 | efforthye fast-filesystem-mcp <= 3.5.1 Command Injection (third-party-advisory)
- cna@vuldb.com (issue-tracking)
- cna@vuldb.com (exploit)
- cna@vuldb.com (product)
Frequently asked questions
- What is CVE-2026-5327?
- CVE-2026-5327 is a medium-severity vulnerability in Efforthye Fast-filesystem-mcp, classified under Improper Neutralization of Special Elements in Output Used by a Downstream Component (Injection). CVSS score: 6.3/10. Published 2026-04-02.
- How severe is CVE-2026-5327?
- Medium severity. CVSS v3 base score is 6.3 out of 10.