CVE-2026-5327

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

CVSS 5.3 MEDIUMEPSS 1.1%CWE-74 CWE-77

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.

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

Affected products

efforthye · fast-filesystem-mcp

public PoCs found — 1

cve_referencegithub.com/user-attachments/files/25822878/fast-filesystem-mcp_bug.pdfunverified

⚠ Public resources, to assess the exposure of systems you control or are authorized to test. Test only with authorization.

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References

https://github.com/efforthye/fast-filesystem-mcp/https://github.com/efforthye/fast-filesystem-mcp/issues/15 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