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.
History

Tue, 20 Oct 2026 21:30:00 +0000

Type Values Removed Values Added
Metrics ssvc

{'options': {'Automatable': 'no', 'Exploitation': 'none', 'Technical Impact': 'total'}, 'version': '2.0.3'}

ssvc

{'options': {'Automatable': 'no', 'Exploitation': 'active', 'Technical Impact': 'total'}, 'version': '2.0.3'}


Tue, 20 Oct 2026 20:30:00 +0000


Tue, 20 Oct 2026 19:30:00 +0000

Type Values Removed Values Added
Metrics kev

{'dateAdded': '2026-10-20T00:00:00+00:00', 'dueDate': '2026-10-23T00:00:00+00:00'}


Tue, 29 Sep 2026 18:45:00 +0000

Type Values Removed Values Added
CPEs cpe:2.3:a:plex:media_server:*:*:*:*:*:*:*:*

Wed, 23 Sep 2026 18:30:00 +0000

Type Values Removed Values Added
First Time appeared Plex
Plex media Server
Vendors & Products Plex
Plex media Server

Wed, 23 Sep 2026 17:30:00 +0000

Type Values Removed Values Added
Metrics ssvc

{'options': {'Automatable': 'no', 'Exploitation': 'none', 'Technical Impact': 'total'}, 'version': '2.0.3'}


Wed, 23 Sep 2026 16:30:00 +0000

Type Values Removed Values Added
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.
Title Plex Media Server arbitrary file write
Weaknesses CWE-73
References
Metrics cvssV3_1

{'score': 7.2, 'vector': 'CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H'}

cvssV4_0

{'score': 8.6, 'vector': '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'}


cve-icon MITRE

Status: PUBLISHED

Assigner: cisa-cg

Published: 2026-09-23T16:07:10.048Z

Updated: 2026-10-21T03:56:10.489Z

Reserved: 2026-09-23T14:42:33.270Z

Link: CVE-2026-96656

cve-icon Vulnrichment

Updated: 2026-09-23T16:36:16.975Z

cve-icon NVD

Status : Analyzed

Published: 2026-09-23T17:17:23.840

Modified: 2026-10-21T13:09:18.913

Link: CVE-2026-96656

cve-icon Redhat

No data.