CVE-2026-5327

MEDIUM 6.3

efforthye fast-filesystem-mcp index.ts handleGetDiskUsage command injection

CVSS Score

6.3

EPSS Score

0.9%

EPSS Percentile

76th

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.

CWE	CWE-77 CWE-74
Vendor	efforthye
Product	fast-filesystem-mcp
Published	Apr 2, 2026
Last Updated	Apr 2, 2026

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CVSS v3 Breakdown

CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:L/E:P/RL:X/RC:C

Attack Vector

Attack Complexity

Privileges Required

User Interaction

Scope

Confidentiality

Integrity

Availability

Affected Versions

efforthye / fast-filesystem-mcp

3.5.0 3.5.1

References

NVD ↗ CVE.org ↗ EPSS Data ↗

vuldb.com: https://vuldb.com/vuln/354658 vuldb.com: https://vuldb.com/vuln/354658/cti vuldb.com: https://vuldb.com/submit/780776 github.com: https://github.com/efforthye/fast-filesystem-mcp/issues/15 github.com: https://github.com/user-attachments/files/25822878/fast-filesystem-mcp_bug.pdf github.com: https://github.com/efforthye/fast-filesystem-mcp/

Credits

🔍 Yinci Chen (VulDB User) VulDB CNA Team