CVE-2026-78430 sworddut CVE debrief

Who should care

Defenders and administrators of systems or applications using sworddut mcp-ffmpeg-helper should assess exposure and verify affected versions. They should also implement compensating controls to monitor and restrict local access to the affected component. Additionally, they should review the supplied official advisory or CVE record to validate affected scope, severity, and vendor guidance, and plan vendor-supported updates or mitigations through normal and

Why it matters

CVE-2026-78430 is a vulnerability in sworddut mcp-ffmpeg-helper that allows local attackers to inject os commands. Defenders should verify exposure, assess affected versions, and implement compensating controls.

• Local attackers may inject os commands, potentially leading to system compromise.
• Verification of affected versions and exposure is necessary.
• Implementing compensating controls to monitor and restrict local access is recommended.

Technical summary

The vulnerability affects the function handleToolCalls of the file src/tools/handlers.ts in sworddut mcp-ffmpeg-helper versions 0.1.0, 0.1.1, and 0.2.1. The manipulation of the argument format results in os command injection, requiring local access. The vulnerability allows local attackers to inject os commands, potentially leading to system compromise. Defenders should verify exposure, assess affected versions, and implement compensating controls. The vulnerability is publicly known and may be used by attackers. There are no known exploits, but defenders should review the supplied official advisory or CVE record to validate affected scope, severity, and vendor guidance.

Defensive priority

Local attackers may attempt to exploit this vulnerability, which requires verification of affected versions and exposure.

Recommended defensive actions

• Verify if the system or application using sworddut mcp-ffmpeg-helper is exposed to local attacks.
• Check if the version of sworddut mcp-ffmpeg-helper is 0.1.0, 0.1.1, or 0.2.1 and update if necessary.
• Implement compensating controls to monitor and restrict local access to the affected component.
• Review the supplied official advisory or CVE record to validate affected scope, severity, and vendor guidance.
• Plan vendor-supported updates or mitigations through normal change control where exposure is confirmed.
• Track exceptions, retest remediated assets, and close the item only after evidence is documented.
• Confirm whether affected product deployments exist in managed environments and assign an owner for follow-up.

Evidence notes

The CVE record and NVD entry provide details on the vulnerability, including its description and affected versions. However, the vendor has not responded to the issue report. The vulnerability is publicly known and may be used by attackers. There are no known exploits, but defenders should verify exposure and assess affected versions. The source references provide additional information on the vulnerability and its impact.

Sources and references

Methodology and review provenance

AI-assisted synthesis based on stored public vulnerability evidence. System validation, approval state, and publication status do not by themselves establish human review of this revision. PatchSiren helps prioritize defensive review and does not prove exposure or remediation on any system.