Vulnerability · Published Aug 24, 2026 · Assigned by VulDB

CVE-2026-78430sworddut mcp-ffmpeg-helper Tool handlers.ts handleToolCall os command injection

Medium 5.3

In plain English

A medium-severity OS command injection in mcp-ffmpeg-helper from sworddut. Proof-of-concept exploit code is public. The chance it is exploited in the next 30 days is estimated at 1.1% (higher than 65% of all known vulnerabilities).

Severity (CVSS 3.1)5.3Medium

Exploit odds (30 days)1.1%top 34.7% of all CVEs

Exploited in the wildNo reportsCISA SSVC: poc

Attack toolingNoneno public tooling known

Official description

A vulnerability was detected in sworddut mcp-ffmpeg-helper 0.1.0/0.1.1/0.2.1. This affects the function handleToolCall of the file src/tools/handlers.ts of the component Tool Handler. The manipulation of the argument format results in os command injection. Attacking locally is a requirement. The exploit is now public and may be used. The project was informed of the problem early through an issue report but has not responded yet.

Affected products (as reported)

Vendor	Product	Versions
sworddut	mcp-ffmpeg-helper	0.1.00.1.10.2.1

Weakness: CWE-78, CWE-77 · Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:L/E:P/RL:X/RC:R

References

VDB-394711 | sworddut mcp-ffmpeg-helper Tool handlers.ts handleToolCall os command injection vdb-entry, technical-description
VDB-394711 | CTI Indicators (IOB, IOC, TTP, IOA) signature, permissions-required
CVE-2026-78430 | CVE Analysis and Report third-party-advisory
Submit #886393 | sworddut mcp-ffmpeg-helper (FFmpeg MCP Server; npm @sworddut/mcp-ffmpeg-helper) <=0.2.1 (0.1.0, 0.1.1, 0.2.1; no fixed release) OS Command Injection third-party-advisory
https://github.com/sworddut/mcp-ffmpeg-helper/issues/6 exploit, issue-tracking
https://github.com/sworddut/mcp-ffmpeg-helper/ product