Plex Media Server up to 1.42.1 /system/agents/media/get url path traversal

Summaryinfo

A vulnerability, which was classified as critical, has been found in Plex Media Server. This issue affects some unknown processing of the file /system/agents/media/get. This manipulation of the argument url causes path traversal. The identification of this vulnerability is CVE-2026-96651. It is possible to initiate the attack remotely. There is no exploit available. It is advisable to upgrade the affected component.

Detailsinfo

A vulnerability was found in Plex Media Server. It has been declared as critical. Affected by this vulnerability is an unknown functionality of the file /system/agents/media/get. The manipulation of the argument url with an unknown input leads to a path traversal vulnerability. The CWE definition for the vulnerability is CWE-22. The product uses external input to construct a pathname that is intended to identify a file or directory that is located underneath a restricted parent directory, but the product does not properly neutralize special elements within the pathname that can cause the pathname to resolve to a location that is outside of the restricted directory. As an impact it is known to affect confidentiality, integrity, and availability. The summary by CVE is:

Plex Media Server before 1.43.3.10861 builds a file path from the url parameter without checking it for ../ sequences, allowing path traversal via '/system/agents/media/get'. A remote attacker with a valid session token could read any file that the target user can access. This access includes the PlexOnlineToken, which grants control of the Plex account and server. A LAN-adjacent attacker with a client-supplied X-Forwarded-For header could exploit the same issue.

It is possible to read the advisory at raw.githubusercontent.com. This vulnerability is known as CVE-2026-96651 since 09/23/2026. The exploitation appears to be easy. The attack can be launched remotely. Technical details of the vulnerability are known, but there is no available exploit. The attack technique deployed by this issue is T1006 according to MITRE ATT&CK.

Upgrading to version 1.43.3.10861 eliminates this vulnerability.

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Productinfo

Vendor

• Plex

Name

• Media Server

Version

• 0.9.9.2
• 0.9.9.2.374
• 0.9.9.3
• 0.9.9.10
• 1.42.1

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CPE 2.2info

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