OS Command Injection in Sworddut MCP-FFmpeg-Helper by Sworddut
CVE-2026-78430

4.8MEDIUM

Key Information:

Vendor

Sworddut

Status
Mcp-ffmpeg-helper
Vendor
CVE Published:
24 August 2026

Badges

👾 Exploit Exists🟡 Public PoC

What is CVE-2026-78430?

A vulnerability exists in Sworddut's MCP-FFmpeg-Helper affecting versions 0.1.0, 0.1.1, and 0.2.1 that allows for OS command injection. This is due to improper handling of input arguments in the 'handleToolCall' function specifically in the 'src/tools/handlers.ts' file. Exploitation requires local access to the affected system, and the vulnerability has been publicly disclosed. The development team has been notified of this critical issue but has yet to release a patch or address the problem.

Affected Version(s)

mcp-ffmpeg-helper 0.1.0

mcp-ffmpeg-helper 0.1.1

mcp-ffmpeg-helper 0.2.1

Exploit Proof of Concept (PoC)

PoC code is written by security researchers to demonstrate the vulnerability can be exploited. PoC code is also a key component for weaponization which could lead to ransomware.

CVE-2026-78430 - Proof of Concept

References

https://vuldb.com/vuln/394711
vdb-entrytechnical-description
https://vuldb.com/vuln/394711/cti
signaturepermissions-required
https://vuldb.com/cve/CVE-2026-78430
third-party-advisory

CVSS V4

Score:
4.8
Severity:
MEDIUM
Confidentiality:
Low
Integrity:
Low
Availability:
Low
Attack Vector:
Local
Attack Complexity:
Low
Attack Required:
None
Privileges Required:
Undefined
User Interaction:
None

Timeline

  • 🟡

    Public PoC available

  • 👾

    Exploit known to exist

  • Vulnerability published

  • Vulnerability Reserved

Credit

Classif1ed_mick (VulDB User)
VulDB CNA Team
.