CVE-2026-96656Media Server Vulnerability
Plex Media Server arbitrary file write
Published Sep 23, 2026 · Updated Oct 20, 2026 · Also known as EUVD-2026-85370, GHSA-2g2v-9wf5-6m3g
Key Facts
Patch immediately- CVE-2026-96656 is a high-severity vulnerability (CVSS 8.6 v4) affecting Media Server (Plex).
- It is exploited in the wild, listed in CIRCL KEV, Industry KEV feed since Oct 18, 2026. No public exploit code is known.
- EPSS estimates a 0.4% probability of exploitation in the next 30 days.
- Fixed versions are available, including Media Server 1.43.3.10861, Media Server 1.43.0.10861.
- Brandefense priority: patch immediately, because it is listed as exploited in the wild.
Scores
CVSS v4
8.6
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
EPSS (30-day exploit likelihood)
0.4%
Higher than 32.3% of all scored CVEs
Exploit maturity
Proof of concept
ATLAS score
35/100
Publication score, see How it works
Exploitation Verdict
KEV listed
Oct 18, 2026
Federal due date
None
No federal due date
Ransomware use
Not reported
Attributed actors
None named
Exploit & Defence Guidance
Exploit maturity
Proof of concept
Public exploit code
1
Proof-of-concept links
In-the-wild evidence
1
Reports of active use
Advisories And Exploit References
- advisoryurl
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.
Known-Exploited Catalog Listings
| Catalog | Added | Remediation due | Ransomware use |
|---|---|---|---|
| CIRCL KEV | Oct 18, 2026 | n/a | Not reported |
| Industry KEV feed | Oct 18, 2026 | n/a | Not reported |
Affected Products
3 affected entries in total| Product | Affected versions | Fixed in |
|---|---|---|
| Media ServerPlex | See advisory | 1.43.0.10861 |
Patched Releases
Media Server
1.43.3.10861, 1.43.0.10861
Timeline
Publicly disclosed
Sep 23, 2026
Added to CIRCL KEV
Oct 18, 2026
Added to Industry KEV feed
Oct 18, 2026
Last updated
Oct 20, 2026
Weakness Type
- CWE-73 External Control of File Name or Path
References
- advisoryurl
- exploitVulnCheck exploitation report
- otherurl
- otherurl
FAQ
Common Questions.
Plex Media Server before 1.43.3.10861 allows an admin user to write arbitrary files that may be executed on load.
Affected: Media Server (Plex). The full list is in the CVE brief.
It is exploited in the wild, listed in CIRCL KEV, Industry KEV feed since Oct 18, 2026.
No, it is not currently listed in the CISA Known Exploited Vulnerabilities catalog.
No public exploit code is known.
Fixed versions are available, including Media Server 1.43.3.10861, Media Server 1.43.0.10861.
Brandefense priority: patch immediately, because it is listed as exploited in the wild.
Is CVE-2026-96656 On Your Attack Surface?
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