Medium 5.4Published Oct 16, 2026

CVE-2026-111728Seanime v3.10.3 Argument Injection via TranscodeHwAccelCustomSettings

Updated under an hour ago (2026-10-19 08:30 UTC)

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Exploited in the last 30 days

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.

CVSS: 5.4 MEDIUM (v3.1, CNA)CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N
Weakness (CWE): CWE-88
Known exploited: Not in CISA's KEV catalog
EPSS (exploitation in the next 30 days): Not loaded for this CVE
Assigned by: VulnCheck
NVD analysis: Deferred
Record last updated: Oct 16, 2026
First seen by InfoSec Signals: Oct 16, 2026

Affected products

Affected products

5rahim Seanime 5rahim:seanime (from the name)	from 3.7.0 before 3.10.4	CNA record

References

https://github.com/5rahim/seanime/commit/d7b13706da236473f33163b1222eb09587e93388patch
https://github.com/5rahim/seanimeproduct
https://www.vulncheck.com/advisories/seanime-argument-injection-via-transcodehwaccelcustomsettingsthird-party-advisory

The CVE record on cve.org NVD's entry

The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.