CVE-2026-96656

EUVD-2026-85370
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.
ProviderTypeBase ScoreAtk. VectorAtk. ComplexityPriv. RequiredVector
NISTPrimary
7.2 HIGH
NETWORK
LOW
HIGH
CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H
Base Score
CVSS 3.x
EPSS Score
Percentile: 78.44%
Affected Products (NVD)
VendorProductVersion
plexmedia_server
𝑥
< 1.43.3.10861
𝑥
= Vulnerable software versions
Common Weakness Enumeration
Vulnerability Media Exposure
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
https://www.boredhackerblog.info/2026/10/plex-vulnerabilities-being-exploited-in.html
https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2026-96656