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

High CISA KEV

Plex Media Server contains a server-side request forgery (SSRF) vulnerability that could allow an authenticated user to request arbitrary internal or external addresses via the '/video/:/transcode/universal' path parameter. This vulnerability can be chained with CVE-2026-96652, CVE-2026-96654, and CVE-2026-96656.

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).

Affected PHP branches

See the source advisory.

Check your site

Source: CISA Known Exploited Vulnerabilities Catalog · retrieved 2026-10-22T10:19:14-04:00 · https://www.cisa.gov/sites/default/files/feeds/known_exploited_vulnerabilities.json

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