CVE-2026-96655

Plex Media Server arbitrary-host SSRF

CVSS 4.0 Medium 5.3Known exploited (CISA KEV)

CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N

Description

Plex Media Server before 1.43.3.10861 allows an authenticated user to request arbitrary internal or external addresses via the '/video/:/transcode/universal' path parameter.

Key data

CVSS 4.0 Medium 5.3

Score published by cisa-cg in the CVE record.

CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N

Attack vector: Network
The vulnerable component can be reached over a network, possibly from the Internet.
Attack complexity: Low
No measurable action is needed to get around the system's built-in security controls. The attack is repeatable.
Attack requirements: None
The attack works without any special deployment or execution conditions.
Privileges required: Low
A basic user account is needed.
User interaction: None
No action from any user is needed.
Vulnerable system: confidentiality: Low
Limited effect on the secrecy of data.
Vulnerable system: integrity: None
No effect on the trustworthiness of data.
Vulnerable system: availability: None
No effect on availability.
Subsequent systems: confidentiality: None
No effect on other systems' data secrecy.
Subsequent systems: integrity: None
No effect on other systems' data trustworthiness.
Subsequent systems: availability: None
No effect on other systems' availability.

Metric	Value	What it means
Attack vector	Network	The vulnerable component can be reached over a network, possibly from the Internet.
Attack complexity	Low	No measurable action is needed to get around the system's built-in security controls. The attack is repeatable.
Attack requirements	None	The attack works without any special deployment or execution conditions.
Privileges required	Low	A basic user account is needed.
User interaction	None	No action from any user is needed.
Vulnerable system: confidentiality	Low	Limited effect on the secrecy of data.
Vulnerable system: integrity	None	No effect on the trustworthiness of data.
Vulnerable system: availability	None	No effect on availability.
Subsequent systems: confidentiality	None	No effect on other systems' data secrecy.
Subsequent systems: integrity	None	No effect on other systems' data trustworthiness.
Subsequent systems: availability	None	No effect on other systems' availability.

CVSS 3.1 Medium 4.3

Score published by cisa-cg in the CVE record.

CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N

Attack vector: Network
The vulnerable component can be reached over a network, possibly from the Internet.
Attack complexity: Low
No special conditions are needed. The attack can be repeated at will.
Privileges required: Low
A basic user account is needed.
User interaction: None
No action from any user is needed.
Scope: Unchanged
The impact stays within the vulnerable component.
Confidentiality impact: Low
Limited effect on the secrecy of data.
Integrity impact: None
No effect on the trustworthiness of data.
Availability impact: None
No effect on availability.

Metric	Value	What it means
Attack vector	Network	The vulnerable component can be reached over a network, possibly from the Internet.
Attack complexity	Low	No special conditions are needed. The attack can be repeated at will.
Privileges required	Low	A basic user account is needed.
User interaction	None	No action from any user is needed.
Scope	Unchanged	The impact stays within the vulnerable component.
Confidentiality impact	Low	Limited effect on the secrecy of data.
Integrity impact	None	No effect on the trustworthiness of data.
Availability impact	None	No effect on availability.

CVSS is owned and managed by FIRST.Org, Inc. (FIRST) and is used by permission. Each CVSS score on this site is shown together with its vector string, as published in the CVE record by the source named next to it. Learn more at first.org/cvss.

EPSS

Exploit Prediction Scoring System by FIRST: an estimate of the probability that exploitation activity will be observed in the next 30 days.

Score: 0.10724 (10.7% probability)
Percentile: 95.9%
Scores of: Nov 10, 2026
Model: v2026.06.15

CISA Known Exploited Vulnerabilities

This CVE is listed in the CISA KEV catalog.

Name in the catalog: Plex Media Server Server-Side Request Forgery (SSRF) Vulnerability
Added to the catalog: Oct 20, 2026
Federal due date: Nov 3, 2026

CISA assessment as of Oct 20, 2026

Stakeholder-Specific Vulnerability Categorization (SSVC) decision points added by CISA.

Exploitation: Recorded by CISA as active
Automatable: no
Technical impact: partial

Weakness (CWE)

CWE catalog version 5.0.

CWE-918Server-Side Request Forgery

Affected products

Products listed in the CVE record, as the CNA published them.

Plex Media Server
- affected: before 1.43.3.10861
- unaffected: 1.43.3.10861

References

Links listed in the CVE record. They lead to other sites, which CubePath does not control.

url (raw.githubusercontent.com)third-party-advisory
url (forums.plex.tv)release-notes
url (cve.org)vdb-entry
url (zmain.info)third-party-advisory

Timeline

ID reservedSep 23, 2026
Record publishedSep 23, 2026
Added to CISA KEVOct 20, 2026
Record last updatedOct 21, 2026

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About CubePath

CubePath is a cloud provider with data centers in Europe and the United States. It offers VPS, bare metal servers and DDoS protection.

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Data from the CVE Program (MITRE), CISA KEV and FIRST EPSS. CVSS is owned by FIRST and used by permission. Not affiliated with or endorsed by MITRE, CISA or FIRST. Data as of Nov 10, 2026, 19:23 UTC. Sources and licenses