CVE-2026-96655 Plex Media Server: web page flaw
In plain words: A web app can be made to act on someone's behalf or reach places it should not. Stolen sessions, actions taken as the victim, or access to internal systems.
Confirmed exploited by CISA on · US federal patch deadline Nov 3, 2026
What to do
- Install Plex's security update for Media Server. If no update exists, follow the vendor's workaround or stop using the product until one ships.
- Keep a list of every internet-facing server you run so nothing is forgotten.
- Patch anything in this catalog first, ahead of normal patch cycles.
- Put admin and file-transfer apps behind a VPN or single sign-on instead of the open internet.
Who is affected
Work IT. Aimed mostly at company systems — you are affected through the companies you use, not your own phone.
What's at risk: Mass data theft and ransomware: a single flaw in a file-transfer or email server has exposed thousands of organisations at once.
The details
- Official name
- Plex Media Server Server-Side Request Forgery (SSRF) Vulnerability
- Product
- Plex Media Server
- CISA description
- 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.
- Type of flaw
- Web page flaw (CWE-918)
- Confirmed exploited
- Oct 20, 2026
- US federal patch deadline
- Nov 3, 2026
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Answering about CVE-2026-96655 ·
Questions about CVE-2026-96655
Is CVE-2026-96655 being exploited?
Yes. CISA added CVE-2026-96655 to its Known Exploited Vulnerabilities catalog on Oct 20, 2026, which means there is reliable evidence of real-world attacks.
How do I fix CVE-2026-96655?
Install Plex's security update for Media Server. If no update exists, follow the vendor's workaround or stop using the product until one ships. Keep a list of every internet-facing server you run so nothing is forgotten.
Am I affected by CVE-2026-96655?
Only if you use Plex Media Server. Aimed mostly at company systems — you are affected through the companies you use, not your own phone.