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CVE-2026-1609

HIGH
8.1
CVSS 3.1
Description
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.

Metadata

CVE ID
CVE-2026-1609
State
PUBLISHED
Assigner
redhat
Reserved
2026-01-29 12:08 UTC
Published
2026-07-16 00:26 UTC
Last updated
2026-07-16 00:26 UTC
Primary CWE
CWE-284
Improper Access Control
Vendor / Product
Keycloak / Keycloak
Sources
cve.org  ·  NVD

Severity & Metrics

8.1 HIGH CVSS 3.1
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:N
Affected products (7)
VendorProductPlatformVersions
Keycloak Keycloak — 26.5.0 < 26.5.3
Red Hat Red Hat JBoss Enterprise Application Platform 8 — —
Red Hat Red Hat JBoss Enterprise Application Platform 8 — —
Red Hat Red Hat JBoss Enterprise Application Platform 8 — —
Red Hat Red Hat JBoss Enterprise Application Platform Expansion Pack — —
Red Hat Red Hat JBoss Enterprise Application Platform Expansion Pack — —
Red Hat Red Hat JBoss Enterprise Application Platform Expansion Pack — —
Weakness (CWE)
CWESourceDescription
CWE-284 cna Improper Access Control
CVSS scores (1)
ScoreSeverityVersionSourceVector
8.1 HIGH 3.1 cna CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:N
References (4)
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