CVE-2026-96656

Description

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.

CVSS Vector

References

• https://forums.plex.tv/t/plex-media-server/30447/711
• https://raw.githubusercontent.com/cisagov/CSAF/develop/csaf_files/IT/white/2026/va-26-266-01.json
• https://www.cve.org/CVERecord?id=CVE-2026-96656
• https://zmain.info/blog/plex2shell