CVE-2026-96656 (GCVE-0-2026-96656)
Vulnerability from cvelistv5 – Published: 2026-09-23 16:07 – Updated: 2026-09-23 16:46
VLAI
EPSS
VEX
Title
Plex Media Server arbitrary file write
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.
Severity
SSVC
Exploitation: none
Automatable: no
Technical Impact: total
CISA Coordinator · cisa-cg (v2.0.3)
Decision recorded 2026-09-14 18:24 UTC
CWE
- CWE-73 - External Control of File Name or Path
References
4 references
| URL | Tags |
|---|---|
| https://forums.plex.tv/t/plex-media-server/30447/711 | release-notes |
| https://www.cve.org/CVERecord?id=CVE-2026-96656 | vdb-entry |
| https://raw.githubusercontent.com/cisagov/CSAF/de… | third-party-advisory |
| https://zmain.info/blog/plex2shell | third-party-advisory |
Impacted products
1 product
| Vendor | Product | Version | CPE status | |
|---|---|---|---|---|
| Plex | Media Server |
Affected:
0 , < 1.43.3.10861
(custom)
Unaffected: 1.43.3.10861 |
guessed |
Date Public
2026-08-03 00:00
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Experimental. This forecast is provided for visualization only and may change without notice. Do not use it for operational decisions.
Forecast uses a logistic model when the trend is rising, or an exponential decay model when the trend is falling. Fitted via linearized least squares.
Sightings
| Author | Source | Type | Date | Other |
|---|
Nomenclature
- Seen: The vulnerability was mentioned, discussed, or observed by the user.
- Confirmed: The vulnerability has been validated from an analyst's perspective.
- Published Proof of Concept: A public proof of concept is available for this vulnerability.
- Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
- Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
- Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
- Not confirmed: The user expressed doubt about the validity of the vulnerability.
- Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.
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The MITRE ATT&CK techniques below are AI-generated suggestions, inferred from the description of the
vulnerability by the CIRCL/vulnerability-attack-technique-classification-roberta-base
model, served locally by ML-Gateway.
They have not been verified by an analyst and are provided for guidance only.
The approach is described in our paper Mapping CVEs to MITRE ATT&CK Techniques: A Curated Gold-Set Classifier and the Limits of LLM-Assisted Label Expansion.
Browse all ATT&CK techniques and the vulnerabilities related to each.
The approach is described in our paper Mapping CVEs to MITRE ATT&CK Techniques: A Curated Gold-Set Classifier and the Limits of LLM-Assisted Label Expansion.
Browse all ATT&CK techniques and the vulnerabilities related to each.
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Related by attack behaviour
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