CVE-2026-78430 sworddut mcp-ffmpeg-helper Tool handlers.ts handleToolCall os command injection
Local attackers can execute arbitrary OS commands via the format argument in the handleToolCall function of the mcp-ffmpeg-helper library.
- Exploited in the wild
- Not known
- Login needed
- Any signed-in user
- Attackable
- Local or same network only
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2026-78430?
CVE-2026-78430 is a medium-severity command injection vulnerability in sworddut mcp-ffmpeg-helper, published on 24 Aug 2026. It can only be exploited from the same machine or local network, with no action from the victim.
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.
Which versions are affected by CVE-2026-78430?
How do I fix CVE-2026-78430?
No fix has been published for CVE-2026-78430 yet. Limit exposure of the affected software until one is available.
Upgrade, and pass arguments to programs as a list instead of through a shell. More about Command injection.
Is CVE-2026-78430 being exploited?
It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-78430 exists.
Sources
Also known as GHSA-w4rf-x2r6-4q2w.