CVE-2026-96655

Analyzed Analyzed - Analysis Complete

Authenticated SSRF in Plex Media Server via Transcode Path Parameter

Publication date: 2026-09-23

Last updated on: 2026-09-29

Assigner: Cybersecurity and Infrastructure Security Agency (CISA) U.S. Civilian Government

Description

Plex Media Server before 1.43.3.10861 allows an authenticated user to request arbitrary internal or external addresses via the '/video/:/transcode/universal' path parameter.

CVSS Scores

EPSS Scores

Probability:
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Meta Information

Published

2026-09-23

Last Modified

2026-09-29

Generated

2026-10-14

AI Q&A

2026-09-23

EPSS Evaluated

2026-10-12

NVD

CVE-2026-96655

EUVD

EUVD-2026-85369

Affected Vendors & Products

Vendor	Product	Version / Range
plex	media_server	to 1.43.0.10861 (exc)

Helpful Resources

Exploitability

CWE

KEV

CWE ID	Description
CWE-918	The web server receives a URL or similar request from an upstream component and retrieves the contents of this URL, but it does not sufficiently ensure that the request is being sent to the expected destination.

Attack-Flow Graph

Executive Summary

This vulnerability in Plex Media Server before version 1.43.3.10861 allows an authenticated user to send requests to arbitrary internal or external addresses via the '/video/:/transcode/universal' path parameter. This could enable unauthorized access or data exfiltration.

Detection Guidance

The vulnerability allows authenticated users to request arbitrary internal or external addresses via the '/video/:/transcode/universal' path. To detect this, monitor network traffic for unusual requests to internal/external addresses from Plex Media Server. Check server logs for suspicious '/video/:/transcode/universal' path usage with unexpected parameters.

Impact Analysis

An attacker could exploit this to access internal systems, steal sensitive data, or perform actions on behalf of the authenticated user. It may lead to unauthorized network reconnaissance or further attacks.

Compliance Impact

This vulnerability could lead to unauthorized data access or exfiltration, violating GDPR's data protection principles or HIPAA's security requirements. Organizations may face compliance penalties if exploited.

Mitigation Strategies

Update Plex Media Server to version 1.43.3.10861 or later to address the vulnerability.

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