CVE-2026-96656
Plex Media Server arbitrary file write
CVSS Score
7.2
EPSS Score
0.4%
EPSS Percentile
32th
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.
| CWE | CWE-73 |
| Vendor | plex |
| Product | media server |
| Published | Sep 23, 2026 |
| Last Updated | Oct 21, 2026 |
⚠️ Actively Exploited — Act Now
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CVSS v3 Breakdown
CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H Attack Vector
Network
Attack Complexity
Low
Privileges Required
High
User Interaction
None
Scope
Unchanged
Confidentiality
High
Integrity
High
Availability
High
Affected Versions
Plex / Media Server
0 < 1.43.3.10861
References
forums.plex.tv: https://forums.plex.tv/t/plex-media-server/30447/711 cve.org: https://www.cve.org/CVERecord?id=CVE-2026-96656 raw.githubusercontent.com: https://raw.githubusercontent.com/cisagov/CSAF/develop/csaf_files/IT/white/2026/va-26-266-01.json zmain.info: https://zmain.info/blog/plex2shell boredhackerblog.info: https://www.boredhackerblog.info/2026/10/plex-vulnerabilities-being-exploited-in.html cisa.gov: https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2026-96656
Credits
Zach Main