CVE-2026-111728 Details
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.
An argument injection vulnerability has been identified in Seanime versions 3.7.0 prior to 3.10.4. This vulnerability allows unauthenticated clients on the local network or Tailnet to bypass authorization controls on certain media stream settings. By manipulating the 'transcodeHwAccel' option and injecting custom flags through 'transcodeHwAccelCustomSettings', attackers can alter the FFmpeg command execution. The exploitation of this vulnerability could lead to unauthorized file writes, file truncation, and potentially allow for arbitrary local file reads and data exfiltration using FFmpeg's protocol handlers.
Users can update to Seanime version 3.10.4 or later, where this vulnerability has been addressed.
Metrics
CVSS 4.0 Severity and Vector Strings:
VolerionCVSS 3.x Severity and Vector Strings:
No data available for CVSS Version 2.0 on this CVE.
Volerion
Assessed Oct 16, 2026CISA-ADP
Assessed Oct 16, 2026References to Advisories, Solutions, and Tools
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| URL | Source(s) | Tag(s) |
|---|---|---|
| https://github.com/5rahim/seanime | [email protected] | ProductSource CodeVendor |
| https://github.com/5rahim/seanime/commit/d7b13706da236473f33163b1222eb09587e93388 | [email protected] | Source CodeVendor |
| https://www.vulncheck.com/advisories/seanime-argument-injection-via-transcodehwaccelcustomsettings | [email protected] | Advisory |
Weakness Enumeration
| CWE-ID | CWE Name | Source |
|---|---|---|
| CWE-88 | Improper Neutralization of Argument Delimiters in a Command ('Argument Injection') | [email protected] |
Affected Products
| Product | Versions |
|---|---|
| Seanime | >= 3.7.0, < 3.10.4 (semver) |
CPE
Remediation
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Change History
2 change records found show changes
| Date | Action | Recorded By |
|---|---|---|
| Oct 16, 2026 | CVE Modified | CISA-ADP |
| Oct 16, 2026 | New CVE Received | [email protected] |