CVE-2026-96656: Plex Media Server

High severity, CVSS 7.2. EPSS: 0.4% chance of exploitation in the next 30 days.

Plex Media Server before 1.43.3.10861 allows an admin user to write arbitrary files that may be executed on load. The preference TranscoderH264Options is appended verbatim to x264's option string on every transcode. At startup, all .so files are run without signature, execute bit, or symbol checks.

Affected products

• Plex Media Server: before 1.43.0.10861 (fixed in 1.43.0.10861)

Published 2026-09-23. Last modified 2026-09-29.