CVE-2026-96654
Plex Media Server Improper Neutralization of Encoded URI Schemes in a Web Page Vulnerability
Plex Media ServerApplications & CMS
CVSS
6.9MediumExploit odds (EPSS)0.46%Chance of exploitation activity in the next 30 days, higher than 39% of CVEs. Scored 23 Oct 2026FIRST EPSS
CISA required actionApply 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. CISA KEV
What fixes it
- 1.43.3.10861Media ServerCVE List
A fixed version on one release line is not the upgrade target for every line. Check your exact version and any vendor backports.
Timeline
- 23 Sep 2026, 16:06 UTCPublishedCVE List
- 20 Oct 2026, 12:00 UTCFirst reported exploitedCISA advisories
- 20 Oct 2026Added to CISA KEVCISA KEV
Vendor and government advisories 1
Vendors that say their products are affected, and agencies that issued alerts. Check each for the fixed release of the product you run.
Reports 5
2 outlets report exploitation. Reports are not confirmation; each links to its source.
- @mtcgroupllc.bsky.social: Exploited now: CVE-2026-96654 in Plex Media Server. Added to CISA KEV Oct 20, 2026. CVSS 6.5. Plex Media Server Improper Neutralization of Encoded URI Schemes in a Web Page VulneraBluesky: exploited in the wild, 23 Oct 2026
- @aiuto-ch.bsky.social: CISA KEV | CVE-2026-96654 | Plex / Media Server CISA lists this vulnerability as exploited in the wild. Check affected products and vendor guidance. Source: CISA KEV Full analysis:Bluesky: exploited in the wild, 22 Oct 2026Exploitation reported
- @ninjaintelgroup.bsky.social: 🚨 NEW on CISA KEV — exploited in the wild Plex Media Server: Plex Media Server Improper Neutralization of Encoded URI Schemes in a Web Page Vulnerabili CVE-2026-96654 · patch by 20Bluesky: exploited in the wild, 20 Oct 2026Exploitation reported
- @aipostdaily.bsky.social: CISA added CVE-2026-96654 to its Known Exploited Vulnerabilities list (2026-10-20). Plex Media Server Improper Neutralization of Encoded URI Schemes in a Web Page EPSS today: 0.002Bluesky: exploited in the wild, 20 Oct 2026Exploitation reported
- CISA Adds Six Known Exploited Vulnerabilities to CatalogCISA advisories, 20 Oct 2026Exploitation reported
Description
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.
Text from CVE List
Affected versions 2
- Media Serveraffected: all versions before 1.43.3.10861CVE List
- Media Serverunaffected: 1.43.3.10861CVE List
References 7
- forums.plex.tv/t/important-security-update-for-plex-media-server-v1-43-2-and-earlier/942319Advisoryvia CISA KEV
- raw.githubusercontent.com/cisagov/CSAF/develop/csaf_files/IT/white/2026/va-26-266-01.jsonAdvisoryvia CVE List
- zmain.info/blog/plex2shellAdvisoryvia CVE List
- nvd.nist.gov/vuln/detail/CVE-2026-96654Referencevia CISA KEV
- cve.org/CVERecord?id=CVE-2026-96654Referencevia CVE List
- forums.plex.tv/t/plex-media-server/30447/711Referencevia CVE List
- cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2026-96654Referencevia CVE List