CVE-2026-96656 KEV
7.2
HIGH · CVSS 3.1 · EPSS 0.8% (pctl 55)
Patch first
On CISA KEV — known exploited in the wild, due 2026-10-23.
Description
Plex Media Server before 1.43.3.10861 allows an admin user to write arbitrary files that may be executed on load. The preference TranscoderH264Options is appended verbatim to x264's option string on every transcode. At startup, all .so files are run without signature, execute bit, or symbol checks.
Scoring
| CVSS | 7.2 (HIGH, v3.1) |
|---|---|
| Vector | CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H |
| EPSS | 0.76% — more likely to be exploited than 55% of all CVEs |
| Weakness | CWE-73 |
| On CISA KEV | yes — remediate by 2026-10-23 |
| Public exploit | none known |
| Published | 2026-09-23 |
| Last modified | 2026-10-21 |
CISA KEV
| Name | Plex Media Server External Control of File Name or Path Vulnerability |
|---|---|
| Added | 2026-10-20 |
| Due | 2026-10-23 |
| Vendor / product | Plex / Media Server |
| Ransomware use | none reported |
Affected (1)
| Vendor | Product |
|---|---|
| plex | media server |
References
- https://forums.plex.tv/t/plex-media-server/30447/711
- https://raw.githubusercontent.com/cisagov/CSAF/develop/csaf_files/IT/white/2026/va-26-266-01.json
- https://www.cve.org/CVERecord?id=CVE-2026-96656
- https://zmain.info/blog/plex2shell
- https://www.boredhackerblog.info/2026/10/plex-vulnerabilities-being-exploited-in.html
- https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2026-96656
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