CVE-2026-96655

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.

Score

CVSS 4.0 5.3 Medium

Status

Analyzed - 9119a7d8-5eab-497f-8521-727c672e3725

Published

2026-09-23

Last modified

2026-10-21

Known exploited (CISA KEV)

since 2026-10-20, action due 2026-11-03: 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.

Weaknesses

CWE-918

Affected products

• Media Server (Plex)

References

• https://raw.githubusercontent.com/cisagov/CSAF/develop/csaf_files/IT/white/2026/va-26-266-01.json
• https://forums.plex.tv/t/plex-media-server/30447/711
• https://www.cve.org/CVERecord?id=CVE-2026-96655
• https://zmain.info/blog/plex2shell
• https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2026-96655