CVE-2026-96652

Medium

Plex Media Server Server-Side Request Forgery (SSRF) Vulnerability

4.3 CVSS v3.1 CVSS v4.0: 5.3

Published: Sep 23, 2026
Updated: Oct 21, 2026
Vendor: Plex
Affected versions: See affected products
Weakness: CWE-918

Summary

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.

Severity

Medium (4.3)

CVSS vector

CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N

CVSS v4.0 (5.3)

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/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

Affected products

Plex Media Server < 1.43.3.10861

Exploitation status

Actively exploited

Listed in the CISA Known Exploited Vulnerabilities catalog on Oct 20, 2026. Federal remediation due: Nov 3, 2026.

Technical details

Technical analysis has not been written for this record yet.

Mitigation & remediation

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.