CVE-2026-96656
Plex Media Server arbitrary file write
- Published
- Sep 23, 2026
- Updated
- Sep 23, 2026
- Assigning CNA
- cisa-cg
- Evidence observed
- Oct 19, 2026
Primary CVSS
nvd · CVSS 4.0
CVSS:4.0/AV:N/AC:L/AT:N/PR:H/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:XLow · next 30 days
- Percentile
- 32.2%
- Model date
- Oct 17, 2026
EPSS is a statistical estimate, not a certainty or a measure of impact. Combine it with CVSS, KEV status, exposure and your environment.
Summary
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.
Sources
- plex2shellExploit
CVE-2026-96652 CVE-2026-96654 CVE-2026-96655 CVE-2026-96656
- plex2shell_pcapDetection
Packet capture artifacts of plex2shell exploitation against Plex, including lab and in-the-wild traffic, for building and validating detection signatures.
Responsible use
Use vulnerability information only on systems you own or are authorized to test. Kitploit links to public research metadata and does not store exploit code or malicious payloads.