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.

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 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.

EPSS: 0.011 (62.6th 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

cna@vuldb.com (technical-description, vdb-entry)
cna@vuldb.com (signature, permissions-required)
cna@vuldb.com (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.