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[ CVE-2026-96654 · Published 23 Sep 2026 ]

URL handling flaw exposes Plex Media Server plugin functions

Exploited · CISA KEV CVSS 6.5 EPSS <1%No fix listed yet

[ Why it matters ]Priority signals

  • Exploited in the wild: on CISA's Known Exploited Vulnerabilities list since 2026-10-20

[ Analyst view ]Is this a red alert for you?

Patch within days

CISA lists it as exploited and it needs no credentials, but its impact is limited.

Red alert if
You run an unpatched Plex Media Server reachable from the internet on a network that also hosts business systems.
Can wait if
You do not run Plex, or it runs on an isolated home or media network and you update it this week.
What it is
Plex Media Server before 1.43.3.10861 does not correctly handle URL values in searchOne, which lets an attacker call other plugins' functions with parameters they choose, without logging in.
Impact
An attacker can trigger plugin functions on the Plex server, with limited effects on data according to the scoring. On its own this does not give control of the server, but it can be combined with other Plex flaws.

How an attack would work MITRE ATT&CK

  1. T1190 Exploit Public-Facing ApplicationThe attacker sends crafted search requests to a Plex server on the internet.
  2. T1059 Command and Scripting InterpreterPlugin functions are called with parameters the attacker chooses.

What to do

  1. Update Plex Media Server to 1.43.3.10861 or later; this fixes all four Plex flaws listed together.
  2. Do not expose Plex to the internet unless you need remote access.
Written with AI from the sources on this page on 23 Oct 2026. Check the vendor's advisory before you act.

[ Description ]Official description

Plex Media Server before 1.43.3.10861 does not correctly neutralize URL values included in 'searchOne,' allowing an attacker to call other plugins' functions and supply their own parameters.

CISA: Plex Media Server contains an improper neutralization of encoded URI schemes in a web page vulnerability that could allow an attacker to call other plugins' functions and supply their own parameters. This vulnerability can be chained with CVE-2026-96652, CVE-2026-96655, and CVE-2026-96656.

[ Fixes ]Fixes and patches

CISA required action (US federal deadline 23 Oct 2026): Apply mitigations in accordance with vendor instructions, ensuring compliance with CISA’s BOD 26-04 Prioritizing Security Updates Based on Risk (see URL in Notes) guidance and CISA’s “Forensics Triage Requirements” (see URL in Notes). Follow applicable BOD 26-04 guidance for cloud services or discontinue use of the product if mitigations are unavailable. Stakeholders are responsible for evaluating each asset's internet exposure and ensuring adherence to BOD 26-04 patching guidelines.

No fix or interim patch is linked from our sources yet. Check the vendor references below and limit exposure of affected systems until a fix is available.

[ References ]References