CVE-2026-96656
Plex Media Server arbitrary file write
- State
- Published
- Severity
- 8.6 High
- Published
- Sep 23, 2026
- Updated
- Oct 21, 2026
- Reserved
- Sep 23, 2026
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.
Scores
| CVSS | Score | Vector | Source |
|---|---|---|---|
| 4.0 | 8.6 High | CVSS:4.0/AV:N/AC:L/AT:N/PR:H/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N | cisa-cg |
| 3.1 | 7.2 High | CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H | cisa-cg |
Weaknesses
- CWE-73 External Control of File Name or Path
Affected Products
| Product | Versions |
|---|---|
Media ServerPlex |
|
References
- urlrelease-notes
- urlvdb-entry
- urlthird-party-advisory
- urlthird-party-advisory
- https://www.boredhackerblog.info/2026/10/plex-vulnerabilities-being-exploited-in.htmlthird-party-advisory
- https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2026-96656government-resource
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