CVE-2026-96656Plex Media Server arbitrary file write
Updated under an hour ago ()
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No exploitation reported and no EPSS estimate yet.
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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
- 7.2 HIGH (v3.1, CNA)CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H
- Weakness (CWE)
- CWE-73
- Known exploited
- Not in CISA's KEV catalog
- EPSS (exploitation in the next 30 days)
- Not loaded for this CVE
- Assigned by
- cisa-cg
- NVD analysis
- Analyzed
- Record last updated
- Sep 23, 2026
- First seen by InfoSec Signals
- Oct 9, 2026
Affected products
Plex Media Server plex:media_server (from the name) | before 1.43.3.10861; 1.43.3.10861 not affected | CNA record |
plex media_server plex:media_server | before 1.43.0.10861 | NVD |
References
- https://forums.plex.tv/t/plex-media-server/30447/711release-notes
- https://www.cve.org/CVERecord?id=CVE-2026-96656vdb-entry, third-party-advisory
- https://raw.githubusercontent.com/cisagov/CSAF/develop/csaf_files/IT/white/2026/va-26-266-01.jsonthird-party-advisory
- https://zmain.info/blog/plex2shellthird-party-advisory
The CVE record on cve.org NVD's entry
The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.