CVE entry · CVE-2026-96655
CVE-2026-96655: Plex Media Server Server-Side Request Forgery (SSRF) Vulnerability
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.
- Actively exploited: added to CISA’s KEV catalog on October 20, 2026.
- Use by ransomware: not established so far.
- Remediation deadline for US federal agencies: November 3, 2026.
Description from CISA’s KEV catalog.
What to do
- Check whether your estate includes Plex Media Server, including internet-facing devices.
- Apply the vendor’s patch or mitigations (references below). Failing that, isolate the product or stop using it, as CISA requires of US federal agencies.
- An exploited vulnerability has often been used before it was fixed: look for signs of compromise, especially on internet-facing devices.