CVE-2026-96656
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 Metrics
CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H
Affected Products (1)
| Vendor | Product | Version |
|---|---|---|
| plex | media_server | * < 1.43.3.10861 |
GitHub Security Advisory GHSA-2g2v-9wf5-6m3g
Plex Media Server before 1.43.3.10861 allows an admin user to write arbitrary files that may be...
References (6)
- https://forums.plex.tv/t/plex-media-server/30447/711 Release Notes
- https://raw.githubusercontent.com/cisagov/CSAF/develop/csaf_files/IT/white/2026/va-26-266-01.json Third Party Advisory
- https://www.cve.org/CVERecord?id=CVE-2026-96656 Third Party Advisory, VDB Entry
- https://zmain.info/blog/plex2shell Third Party Advisory
- https://www.boredhackerblog.info/2026/10/plex-vulnerabilities-being-exploited-in.html Third Party Advisory
- https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2026-96656 US Government Resource
Risk Scores
Top 22% most likely to be exploited
CISA Known Exploited
Apply mitigations in accordance with vendor instructions, ensuring compliance with CISA’s BOD 26-04 Prioritizing Security Updates Based on Risk (see URL in Notes) guidance and CISA’s “Forensics Triage Requirements” (see URL in Notes). Follow applicable BOD 26-04 guidance for cloud services or discontinue use of the product if mitigations are unavailable. Stakeholders are responsible for evaluating each asset's internet exposure and ensuring adherence to BOD 26-04 patching guidelines.