Vulnerability details

CVE-2026-120984

Red Hat Build of KeycloakRed Hat Single Sign-On 7

Keycloak-services: keycloak-services: manage-clients to arbitrary code execution through inline javascript policy import

CVSS 3.1

9.1Critical

Official description

A flaw was found in the Keycloak server's client management component. When a client is created or imported with authorization services enabled, the system fails to properly clear an internal session attribute used during the setup process. This allows an authenticated attacker with client management permissions to bypass security controls and upload a malicious JavaScript policy, which is then executed on the server when an authorization request is made. Successful exploitation could allow the attacker to run arbitrary code on the server, potentially compromising the entire system.

CVSS scores

Score	Version	Source	Vector
9.1Critical	3.1	CVEProject cvelistV5 (CNA) (redhat)	`CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:C/C:H/I:H/A:H`

Affected products

Vendor	Product	Versions	Source
Red Hat	Red Hat Build of Keycloak	All	CVEProject cvelistV5 (CNA)
Red Hat	Red Hat Build of Keycloak	All	CVEProject cvelistV5 (CNA)
Red Hat	Red Hat Single Sign-On 7	All	CVEProject cvelistV5 (CNA)

References and advisories

https://access.redhat.com/security/cve/CVE-2026-120984 vdb-entryx_refsource_REDHAT
https://bugzilla.redhat.com/show_bug.cgi?id=2565599 issue-trackingx_refsource_REDHAT

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Details

Published: 2026-11-07
Last updated: 2026-11-09
State: Published
Assigner (CNA): redhat
Kolun priority: 29 · Low

Exploit prediction (EPSS)

0.41%

Probability of exploitation in 30 days

36.2%

Percentile (among all CVEs)

SSVC assessment (CISA)

Automatable: No
Exploitation: None
Technical impact: Total

Weaknesses (CWE)

CWE-94
Improper Control of Generation of Code