CVE-2026-111728 Seanime v3.10.3 Argument Injection via TranscodeHwAccelCustomSettings
Unauthenticated attackers can inject arguments into ffmpeg commands via custom settings, leading to arbitrary file write, truncation, and potential data exfiltration.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Local or same network only
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2026-111728?
CVE-2026-111728 is a medium-severity command injection vulnerability in 5rahim Seanime, published on 16 Oct 2026. It can only be exploited from the same machine or local network, with no action from the victim.
Official description
Seanime v3.7.0 to v3.10.3 contains an argument injection vulnerability reachable through improper authorization, allowing unauthenticated LAN or Tailnet clients to bypass the privileged mediastream settings guard by setting transcodeHwAccel to custom and supplying attacker-controlled decodeFlags and encodeFlags via the transcodeHwAccelCustomSettings field, which are appended verbatim to the ffmpeg argument vector. Attackers can trigger execution via the mediastream request and HLS playlist endpoints to achieve arbitrary file write and file truncation on the host as the user running seanime, with the injected input options also enabling potential arbitrary local file read and outbound data exfiltration through ffmpeg's protocol handlers.
Weakness: CWE-88
Which versions are affected by CVE-2026-111728?
How do I fix CVE-2026-111728?
No fix has been published for CVE-2026-111728 yet. Limit exposure of the affected software until one is available.
Upgrade, and pass arguments to programs as a list instead of through a shell. More about Command injection.
Is CVE-2026-111728 being exploited?
There is no known exploitation of CVE-2026-111728 in the wild and no public exploit code.
Sources
Also known as GHSA-wh8v-5fm8-92q5.