CVE-2026-85696
Received Received - Intake

OS Command Injection in SadTalker Video Muxing

Publication date: 2026-09-04

Last updated on: 2026-09-04

Assigner: VulnCheck

Description
SadTalker contains an OS command injection vulnerability in the video muxing process where uploaded audio filenames are interpolated into ffmpeg commands without proper escaping. Attackers can upload audio files with shell metacharacters in the filename to break out of quoted arguments and execute arbitrary system commands when video generation occurs.

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Meta Information

Published
2026-09-04
Last Modified
2026-09-04
Generated
2026-09-04
AI Q&A
2026-09-04
EPSS Evaluated
N/A
NVD
CVE-2026-85696
EUVD
EUVD-2026-71145

Affected Vendors & Products

Showing 1 associated CPE
Vendor Product Version / Range
opentalker sadtalker to 0.0.2 (inc)

Helpful Resources

Exploitability

CWE
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KEV
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CWE ID Description
CWE-78 The product constructs all or part of an OS command using externally-influenced input from an upstream component, but it does not neutralize or incorrectly neutralizes special elements that could modify the intended OS command when it is sent to a downstream component.

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Executive Summary

SadTalker has an OS command injection flaw where uploaded audio filenames are inserted into ffmpeg commands without proper escaping. Attackers can craft filenames with shell metacharacters to break out of quoted arguments and run arbitrary system commands during video generation.

Detection Guidance

Detecting this vulnerability requires monitoring for unusual ffmpeg command execution patterns or suspicious audio file uploads. Check system logs for ffmpeg processes launched with filenames containing shell metacharacters like semicolons, backticks, or pipes. Inspect uploaded audio files for filenames with special characters that could indicate exploitation attempts.

Impact Analysis

An attacker could exploit this to execute malicious commands on the server running SadTalker, potentially gaining control over the system, stealing data, or disrupting services.

Compliance Impact

This vulnerability could lead to unauthorized access or data breaches, violating GDPR (data protection) and HIPAA (health data privacy) requirements for security controls and breach notifications.

Mitigation Strategies

Immediately update SadTalker to the latest patched version. Implement strict filename validation for uploaded audio files, rejecting any filenames containing shell metacharacters. Restrict ffmpeg command execution permissions and monitor for unauthorized process launches. Consider disabling video generation features temporarily until patched.

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