# CVE-2026-96655: Plex Media Server SSRF via transcode endpoint

Source: https://junglewise.ai/threats/cve-2026-96655-plex-media-server-before-1-43-3-10861-allows-an-authenticated  
Publisher: Junglewise Threat Intelligence, https://junglewise.ai/threats  
Published: 2026-09-23. Updated: 2026-09-26  
License: CC BY 4.0 with a link back

CVE-2026-96655 · Severity: critical · CVSS 4.3 · Exploited in the wild · Published 2026-09-23

Plex Media Server, a media streaming application used to serve video and audio content to authorized users, contains a server-side request forgery (SSRF) vulnerability in its transcoding feature. An authenticated user can exploit this to request arbitrary internal or external network addresses, potentially exposing sensitive internal systems or data from networks where the Plex server is deployed.

Technologies: [Plex Media Server](https://junglewise.ai/threats/technologies/media-server). Vendors: [Plex](https://junglewise.ai/threats/vendors/plex).

## Quick answers

**Is CVE-2026-96655 exploited in the wild?** Yes. CVE-2026-96655 is known to be exploited in the wild, first recorded on 20 October 2026. Treat it as urgent.

**How severe is CVE-2026-96655?** Critical severity, with a CVSS score of 4.3, published 23 September 2026.

**Which products and versions are affected?** Plex Media Server before 1.43.3.10861.

**Is there a fix for CVE-2026-96655?** A patch was published on 2026-09-23: Fixed in version 1.43.3.10861 Junglewise finds every place you run it, drafts the upgrade and applies it once you approve.

**How is CVE-2026-96655 attacked?** It is attacked over the network, in a hosted service.

**Am I affected by CVE-2026-96655?** Check whether you run Plex Media Server at an affected version. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.

## Technical details

The vulnerability exists in the '/video/:/transcode/universal' endpoint and allows authenticated users to perform server-side request forgery by manipulating path parameters. An attacker with valid authentication credentials can craft requests to access internal or external addresses that the Plex server can reach, bypassing network segmentation. No privilege escalation is required beyond normal user authentication.

## Affected products

- Plex Media Server before 1.43.3.10861

## Timeline

- 2026-09-23: disclosed
- 2026-09-23: patched: Fixed in version 1.43.3.10861

## References

- [https://forums.plex.tv/t/plex-media-server/30447/711](https://forums.plex.tv/t/plex-media-server/30447/711)
- [https://raw.githubusercontent.com/cisagov/CSAF/develop/csaf_files/IT/white/2026/va-26-266-01.json](https://raw.githubusercontent.com/cisagov/CSAF/develop/csaf_files/IT/white/2026/va-26-266-01.json)

## Related threats

- [Plex Media Server arbitrary file write in transcoder options](https://junglewise.ai/threats/cve-2026-96656-plex-media-server-before-1-43-3-10861-allows-an-admin-user-to)
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- [Plex Media Server SSRF via /player/timeline](https://junglewise.ai/threats/cve-2026-96652-plex-media-server-before-1-43-3-10861-allows-ssrf-via-player)
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