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.
Attack Parameters
Attack Vector
Network
Can be exploited remotely
Attack Complexity
Low
Easy to exploit
Attack Requirements
None
No additional conditions
Privileges Required
High
Admin privileges needed
User Interaction
None
No user interaction needed
Impact Assessment
Confidentiality
High
Complete data leak
Integrity
High
Complete data modification
Availability
High
Complete denial of service
CVSS Vector v4.0
Weakness Type (CWE)
Vulnerable Products 1
| Configuration | From (including) | Up to (excluding) |
|---|---|---|
|
Plex Media_Server
cpe:2.3:a:plex:media_server:*:*:*:*:*:*:*:*
|
— |
1.43.0.10861
|
References 6
https://forums.plex.tv/t/plex-media-server/30447/711
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https://raw.githubusercontent.com/cisagov/CSAF/develop/csaf_files/IT/white/2026…
9119a7d8-5eab-497f-8521-727c672e3725
https://www.cve.org/CVERecord?id=CVE-2026-96656
9119a7d8-5eab-497f-8521-727c672e3725
https://zmain.info/blog/plex2shell
9119a7d8-5eab-497f-8521-727c672e3725
https://www.boredhackerblog.info/2026/10/plex-vulnerabilities-being-exploited-i…
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https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2026…
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