8.1

CVE-2026-1609

Org.keycloak/keycloak-quarkus-server: keycloak: unauthorized access via jwt authorization grant with disabled users

A flaw was found in Keycloak. When the JSON Web Token (JWT) authorization grant preview feature is enabled and a user account is disabled, Keycloak fails to validate the user’s disabled status during JWT authorization grant processing. A remote attacker with low privileges can exploit this improper access control vulnerability by presenting a valid assertion token from an external identity provider to obtain a JWT for a disabled user. This allows unauthorized access to sensitive resources.
Daten sind bereitgestellt durch National Vulnerability Database (NVD)
Redhat ≫ Build Of Keycloak Version26.5.2
VulnDex Vulnerability Enrichment
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Zu dieser CVE wurde keine Warnung gefunden.
EPSS Metriken
Typ Quelle Score Percentile
EPSS FIRST.org 0.5% 0.4
CVSS Metriken
Quelle Base Score Exploit Score Impact Score Vector String
NIST 8.1 2.8 5.2
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:N
RedHat 8.1 2.8 5.2
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:N
0b0ca135-0b70-47e7-9f44-1890c2a1c46c 8.1 2.8 5.2
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:N
CWE-284 Improper Access Control

The product does not restrict or incorrectly restricts access to a resource from an unauthorized actor.

https://access.redhat.com/security/cve/CVE-2026-1609
Vendor Advisory
https://bugzilla.redhat.com/show_bug.cgi?id=2435257
Vendor Advisory
Issue Tracking
https://github.com/keycloak/keycloak/issues/46144
Issue Tracking
https://github.com/keycloak/keycloak/releases/tag/26.5.3
Release Notes
https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-1609.json
Vendor Advisory