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CVE-2026-96654 - Plex Media Server Improper Neutralization of Encoded URI Schemes in a Web Page Vulnerability (known exploited)

Added to CISA KEV on 2026-10-20. 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.
CRITICAL CISA KEV ACTIVELY EXPLOITED
Severity & confidence
Source severitycritical
Platform severitycritical
Confidencehigh
Exploitationactively exploited
CVSS-
Affected
ProductsMedia Server
Reporting sources (1)
CISA - Known Exploited Vulnerabilities
Open source โ†—
๐ŸŽฏ Why should I care?
  • On the CISA Known Exploited Vulnerabilities list.
  • Credible sources report active exploitation in the wild.
Timeline & provenance
Published2026-10-20T00:00:00
Last updated2026-10-21T04:58:05
Ingested2026-10-20T19:59:01
FreshnessNEAR-REAL-TIME
Threat typeexploitation
Recommended action
Apply the vendor-supplied patch immediately. Review vendor and CISA guidance for detection and mitigation.
Next steps
  1. Identify affected systems in your environment.
  2. Apply the vendor patch or mitigation guidance.
  3. Review logs for indicators described in the advisory.
  4. Follow the affected vendor/product to track updates.
Confidence explanation
Reported by a government or cert-grade source (CISA, NCSC, NVD, ENISA, MSRC).
Source type: gov ยท Original: CISA - Known Exploited Vulnerabilities