Vulnerability details

CVE-2026-96655

Actively exploited

Plex Media Server

Plex Media Server arbitrary-host SSRF

CVSS 4.0

5.3Medium

Official description

Plex Media Server before 1.43.3.10861 allows an authenticated user to request arbitrary internal or external addresses via the '/video/:/transcode/universal' path parameter.

CVSS scores

Score	Version	Source	Vector
5.3Medium	4.0	CVEProject cvelistV5 (CNA) (cisa-cg)	`CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N`
4.3Medium	3.1	CVEProject cvelistV5 (CNA) (cisa-cg)	`CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N`

Affected products

Vendor	Product	Versions	Source
Plex	Media Server	v < 1.43.3.10861	CVEProject cvelistV5 (CNA)

References and advisories

https://raw.githubusercontent.com/cisagov/CSAF/develop/csaf_files/IT/white/2026/va-26-266-01.json third-party-advisory
https://forums.plex.tv/t/plex-media-server/30447/711 release-notes
https://www.cve.org/CVERecord?id=CVE-2026-96655 vdb-entry
https://zmain.info/blog/plex2shell third-party-advisory
https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2026-96655 government-resource

Kolun on Telegram @kolunsec Exploited CVEs, key news and a daily digest Alerts for this product's next CVEsFollow the product to get new vulnerabilities on Telegram.

Details

Published: 2026-09-23
Last updated: 2026-10-21
State: Published
Assigner (CNA): cisa-cg
Kolun priority: 72 · High

CISA KEV catalog

Date added: 2026-10-20
Due date: 2026-11-03
Used in ransomware: Unknown

Exploit prediction (EPSS)

10.72%

Probability of exploitation in 30 days

95.8%

Percentile (among all CVEs)

2026-11-0510.72%
2026-11-031.63%

SSVC assessment (CISA)

Automatable: No
Exploitation: Active
Technical impact: Partial

Weaknesses (CWE)

CWE-918
Server-Side Request Forgery (SSRF)