CVE-2026-78430Public exploit

Local command execution via unquoted FFmpeg arguments

Published Aug 24, 2026 · Updated Aug 24, 2026

OS command injection in sworddut MCP FFmpeg Helper 0.1.0, 0.1.1, and 0.2.1 allows local users to execute commands via tool arguments. handleToolCall interpolates format and other unvalidated values into FFmpeg command strings, and runFFmpegCommand passes the assembled string to child_process.spawn with shell:true. Exploitation requires influence over an MCP tool call; injected shell syntax executes with the privileges of the local MCP server process.

CVSS severityUnavailable
Unscored
EPSS probability0.63%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

OS command injection in sworddut MCP FFmpeg Helper 0.1.0, 0.1.1, and 0.2.1 allows local users to execute commands via tool arguments. handleToolCall interpolates format and other unvalidated values into FFmpeg command strings, and runFFmpegCommand passes the assembled string to child_process.spawn with shell:true. Exploitation requires influence over an MCP tool call; injected shell syntax executes with the privileges of the local MCP server process.

The record

CVE
CVE-2026-78430
Published
Aug 24, 2026
Updated
Aug 24, 2026
Vendor
sworddut
Product
MCP FFmpeg Helper
Classifications
CWE-77, CWE-78, T1059.003, T1059.004
Attack vector
local
Privileges
Unavailable

Timeline

How it unfolded

  1. Aug 24, 2026CVE publishedPublication date reported by the CVE source.
  2. Aug 24, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=0.1.0
  2. Affected versionversion=0.1.1
  3. Affected versionversion=0.2.1

What conditions does exploitation require?

Attack vectorlocal
Required privilegesUnavailable in this record.

What is affected?

sworddut · MCP FFmpeg Helperversion=0.1.0; version=0.1.1; version=0.2.1

Published CVSS scores

4.3VulDB CNAAV:L/AC:L/Au:S/C:P/I:P/A:P/E:POC/RL:ND/RC:UR
5.3VulDB CNACVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:L/E:P/RL:X/RC:R
4.8VulDB CNACVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:L/VI:L/VA:L/SC:N/SI:N/SA:N/E:P
5.3VulDB CNACVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:L/E:P/RL:X/RC:R

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectorlocal
PrivilegesUnavailable
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

CWE-77Improper Neutralization of Special Elements used in a Command ('Command Injection')
CWE-78Improper Neutralization of Special Elements used in an OS Command ('OS Command Injection')
T1059.003Windows Command Shell
T1059.004Unix Shell

Public exploit references

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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