CVE-2026-96656

Plex Media Server arbitrary file write

En bref

Sévérité: HIGH 8.6
Exploitation: Exploitation connue (CISA KEV) · ajoutée le 2026-10-20
Exploitée selon l'ENISA depuis le 2026-10-20
EPSS: EPSS 1.79 % · centile 78 (2026-10-27)
État: PUBLISHED
Publiée: 2026-09-23
Mise à jour: 2026-10-21
Attribuée par: cisa-cg
Statut NVD: Analyzed

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

Version	Score	Vecteur	Évalué par
CVSS 4.0	HIGH 8.6	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
CVSS 3.1	HIGH 7.2	CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H	cisa-cg
CVSS 4.0	HIGH 8.6	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/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X	NVD · 9119a7d8-5eab-497f-8521-727c672e3725 (Secondary)
CVSS 3.1	HIGH 7.2	CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H	NVD · 9119a7d8-5eab-497f-8521-727c672e3725 (Secondary)

Faiblesses (CWE)

CWE-73

Références européennes

ENISA EUVD · EUVD-2026-85370
GCVE · GCVE-0-2026-96656

Configurations affectées (CPE NVD)

cpe:2.3:a:plex:media_server:*:*:*:*:*:*:*:* < 1.43.3.10861

Produits affectés

Produit	Versions
Plex · Media Server	affected 0 < 1.43.3.10861 ; unaffected 1.43.3.10861

Références

Sources

Source	Licence
CVE List (CVEProject cvelistV5)	CVE Program Terms of Use
CISA Known Exploited Vulnerabilities	CC0 1.0
EPSS (FIRST.org)	FIRST — attribution requested
ENISA EUVD	ENISA — reproduction authorised, source acknowledged
NVD (NIST) via fkie-cad/nvd-json-data-feeds	Public domain — this product uses data from the NVD API but is not endorsed or certified by the NVD