CVE-2026-78430

MEDIUMPre-NVD 5.35.3—
EchelonGraph scoreHIGH confidence

Score 5.3 from GitHub Security Advisory (severity: LOW) published 2026-08-24. a secondary CVSS source baseline 5.3; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: epss, ghsa, secondary
Trending — 5 sources updated this weekElevated
5.3EG
EchelonGraph verdictMonitorLow exploitation likelihood right now — keep watching.
  • Lower severity and no public exploit yet
CISA-KEV: Not listedEPSS PROB: 1%CVSS: 5.3Exploit: Elevated riskExposed: 0

No vendor fix yet — apply a workaround or compensating control (WAF / firewall / segmentation) and watch for a patch.

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.

CVSS v3
5.3
EG Score
5.3(high)
EG Risk
40(Track)
EG Risk 40/100SSVC: Track

EG Risk is EchelonGraph's 0–100 priority score: it fuses intrinsic severity with real-world exploitation and automatability so you can rank equal-severity CVEs and fix the most dangerous first. Higher = act sooner. Distinct from the 0–10 EG Score (severity).

How it’s computed
Severity53% × 45%
Exploitation40% × 40%
Automatability0% × 15%
Action: Routine — remediate on your standard cadence.
EPSS PROB
1%
EPSS %ILE
48%
KEV
Not listed

Published

August 24, 2026

Last Modified

August 26, 2026

Advisory Details (2)

Auto-updated Aug 24, 2026
🔬 Proof of concept available. No patch confirmed yet.
generic

GitHub - sworddut/mcp-ffmpeg-helper: 一个基于 Model Context Protocol (MCP) 的 FFmpeg 辅助工具，提供视频处理功能。 · GitHub

https://github.com/sworddut/mcp-ffmpeg-helper/
generic🟡 PoC Available

Security: OS command injection via unsanitized tool arguments in runFFmpegCommand (shell:true) · Issue #6 · sworddut/mcp-ffmpeg-helper · GitHub

https://github.com/sworddut/mcp-ffmpeg-helper/issues/6

Vendor Advisories for CVE-2026-78430(1)

These vendors published their own advisory mentioning this CVE — often with vendor-specific remediation steps + affected product lists not in NVD.

Weakness Classification(2)

MITRE Common Weakness Enumeration — the root-cause categories this CVE belongs to.

Data Freshness Timeline

(refreshed 19× in last 7d / 19× in last 30d)

Each row is a source pipeline that fetched or updated this CVE on that date, with what changed. For example, "NVD update" means NVD published or revised its analysis for this CVE; "MITRE cvelistV5" means we ingested or refreshed it from the CNA feed. Most recent first.

  1. 2026-08-30 01:22 UTCEPSS rescore
  2. 2026-08-29 10:19 UTCEG score recompute
  3. 2026-08-29 10:19 UTCGHSA enrichment
  4. 2026-08-28 21:42 UTCEPSS rescore
  5. 2026-08-28 12:22 UTCEG score recompute
  6. 2026-08-28 12:21 UTCGHSA enrichment
  7. 2026-08-27 14:25 UTCEPSS rescore
  8. 2026-08-27 14:22 UTCGHSA enrichment
  9. 2026-08-26 16:24 UTCEG score recompute
  10. 2026-08-26 16:24 UTCGHSA enrichment
  11. 2026-08-26 14:47 UTCEPSS rescore
  12. 2026-08-25 18:21 UTCEG score recompute
  13. 2026-08-25 18:21 UTCGHSA enrichment
  14. 2026-08-25 13:49 UTCEPSS rescore
  15. 2026-08-24 20:25 UTCEG score recompute
  16. 2026-08-24 20:25 UTCNVD updateCVSS v4 → 1.9
  17. 2026-08-24 20:11 UTCEG score recompute
  18. 2026-08-24 19:51 UTCEG score recompute
  19. 2026-08-24 19:51 UTCMITRE cvelistV5first tracked

Related CVEs(same CWE)

Frequently asked(5)

What is CVE-2026-78430?
CVE-2026-78430 is a medium vulnerability published on August 24, 2026. 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…
When was CVE-2026-78430 disclosed?
CVE-2026-78430 was first published in the National Vulnerability Database on August 24, 2026, with the most recent update on August 26, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-78430 actively exploited?
CVE-2026-78430 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 1% probability of exploitation in the next 30 days, which ranks it in the top 52.4% of all scored CVEs.
What is the CVSS score of CVE-2026-78430?
CVE-2026-78430 has a CVSS v3 base score of 5.3 (NVD).
How do I remediate CVE-2026-78430?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-78430, EchelonGraph cross-links them in the Vendor Advisories panel below — those typically contain the canonical remediation steps, fixed version numbers, and any vendor-specific mitigations.

Dependency Blast Radius

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