Plex Media Server Improper Neutralization of Encoded URI Schemes in a Web Page Vulnerability
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.
- Vendor
- Plex
- Product
- Media Server
- CVSS
- 6.5
- EPSS (exploit probability)
- 0.2%
- Status
- kev
- CISA patch-by (BOD 22-01)
- Added to KEV
Is CVE-2026-96654 being exploited?
Yes. CISA added CVE-2026-96654 to its Known Exploited Vulnerabilities catalog on . CISA only lists a CVE when it has reliable evidence of exploitation in the wild.
FIRST's EPSS model puts the probability of exploitation activity in the next 30 days at 0.2% (scored October 20, 2026).
- CISA KEV[ LISTED ]
- ENISA EUVD (exploited)[ — ]
- CIRCL KEV[ — ]
Catalog snapshot 2026-10-20. Full cross-catalog view: /kev-comparison
What to do
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.
US federal civilian agencies must remediate by (3 days after listing) under BOD 22-01. Everyone else: that deadline is a sensible upper bound, not a target. Vendor guidance and the NVD record are linked under Source above.
Other Plex Media Server CVEs we track
| CVE / Vulnerability | Severity | CVSS | EPSS | Added to KEV |
|---|---|---|---|---|
| CVE-2026-96656 Plex Media Server arbitrary file write via transcoder preferenceswrite-up | [ HIGH ] | 7.2 | 0.4% | |
| CVE-2026-96655 Plex Media Server Server-Side Request Forgery (SSRF) Vulnerability | [ MEDIUM ] | 4.3 | 0.2% | |
| CVE-2026-96652 Plex Media Server Server-Side Request Forgery (SSRF) Vulnerability | [ MEDIUM ] | 4.3 | 0.2% | |
| CVE-2020-5741 Plex Media Server Remote Code Execution Vulnerability | [ HIGH ] | 7.2 | 72.8% |