CVE-2026-111728

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 v3 5.4 MEDIUM

5.4^/10

CVSS v3 : MEDIUM

Vector :

Exploitability : 2.8 / Impact : 2.5

Attack Vector ADJACENT_NETWORK

Attack Complexity LOW

Privileges Required NONE

User Interaction NONE

Confidentiality Impact LOW

Integrity Impact LOW

Availability Impact NONE

Scope UNCHANGED

References

Link	Resource
https://github.com/5rahim/seanime
https://github.com/5rahim/seanime/commit/d7b13706da236473f33163b1222eb09587e93388
https://www.vulncheck.com/advisories/seanime-argument-injection-via-transcodehwaccelcustomsettings

Configurations

No configuration.

History

16 Oct 2026, 15:17

Type	Values Removed	Values Added
New CVE

Information

Published : 2026-10-16 15:17

Updated : 2026-10-16 18:25

NVD link : CVE-2026-111728

Mitre link : CVE-2026-111728

CVE.ORG link : CVE-2026-111728

JSON object : View

Products Affected

No product.

CWE

CWE-88

Improper Neutralization of Argument Delimiters in a Command ('Argument Injection')

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