CVE-2026-96652mediumunder attackCWE-918

CVE-2026-96652: medium-severity vulnerability in Plex Media Server

Plex Media Server SSRF

Published · Updated

Follow this CVE+ Monitor Media Server

E-mail alert when it lands in KEV, gets a public PoC or its score goes up.

88Vexday Risk Score

Patch now. It under exploitation confirmed by CISA and has a working public exploit.

ssvc Actcvss 5.3epss 12%
from disclosure to weapon23 days
Published on NVDSep 23
1st PoC+23d
CISA KEV+27d
Action required by CISAfederal deadline: 2026-11-03

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.

In short

Plex Media Server versions before 1.43.3.10861 can be tricked into sending requests to addresses chosen by an attacker. This could expose internal services or data that the server can reach but outsiders cannot.

Technical detail

Plex Media Server before 1.43.3.10861 is vulnerable to server-side request forgery (CWE-918) through the /player/timeline endpoint. Any valid X-Plex-Token value suffices, and an attacker can supply a full URL in the 'protocol' parameter to make the server issue a POST request to an arbitrary destination. The CVSS score is 5.3 (MEDIUM), and the impact is limited to the network reach and trust of the Plex host.

Summary generated and translated by AI from the official description.
Plex Media Server before 1.43.3.10861 allows SSRF via '/player/timeline'. An attacker using any X-Plex-Token value can include a full URL in the 'protocol' parameter and force the Plex server to POST to the attacker's chosen destination.
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
Affected products
Plex · Media Server
⚠ Public resources, to assess the exposure of systems you control or are authorized to test. Test only with authorization.
Related CVEs — Plex Media Server

In the same product, most dangerous first.

CVE-2026-96655MEDIUMPlex Media Server arbitrary-host SSRFEPSS 10.7%KEVCVE-2026-96654MEDIUMPlex Media Server URL injectionEPSS 1.9%KEVCVE-2026-96656HIGHPlex Media Server arbitrary file writeEPSS 1.8%KEVCVE-2026-96651HIGHPlex Media Server path traversalEPSS 0.8%CVE-2025-34158HIGHCVE-2025-34158EPSS 0.6%CVE-2025-69415HIGHCVE-2025-69415EPSS 0.3%