CVE-2026-96656
Plex Media Server External Control of File Name or Path Vulnerability
Plex Media Server contains an external control of file name or path vulnerability which can allow an admin user to write arbitrary files that may be executed on load. This vulnerability can be chained with CVE-2026-96652, CVE-2026-96654, and CVE-2026-96655.
CISA due Oct 23, 2026
- Plex Media Server
- High
- CVSS 8.6
- EPSS 0.82%
- Fixed version listed
What to do
Fixed version listed
- Required action
- 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.
- CISA deadline for US federal agencies
- Oct 23, 2026
Affected products
| Product | Affected | Fixed in |
|---|---|---|
| Plex Media Server | before 1.43.3.10861 | 1.43.3.10861 |
Scores and signals
- Exploitation
- Exploited in the wild
- Severity
- High, CVSS 8.6 (v4.0, scored by cisa-cg)
- EPSS
- 0.82% chance of exploitation in the next 30 days (EPSS from FIRST, as of Oct 24, 2026)
- CISA's SSVC decision points
- Exploitation: active. Automatable: no. Technical impact: total. As of Oct 19, 2026.
- Weakness
- CWE-73: External Control of File Name or Path
- Vendor
- Plex, Media Server
Timeline
- Added to CISA's Known Exploited Vulnerabilities catalog: exploited in the wild. US federal agencies must remediate by 2026-10-23.