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.
Metrics
Affected Vendors & Products
References
History
Thu, 16 Jul 2026 16:30:00 +0000
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| Metrics |
ssvc
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Thu, 16 Jul 2026 01:00:00 +0000
| Type | Values Removed | Values Added |
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| Title | org.keycloak/keycloak-quarkus-server: Keycloak: Unauthorized Access via JWT authorization grant with disabled users | Org.keycloak/keycloak-quarkus-server: keycloak: unauthorized access via jwt authorization grant with disabled users |
| First Time appeared |
Redhat
Redhat jboss Enterprise Application Platform Redhat jbosseapxp |
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| CPEs | cpe:/a:redhat:jboss_enterprise_application_platform:8 cpe:/a:redhat:jbosseapxp |
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| Vendors & Products |
Redhat
Redhat jboss Enterprise Application Platform Redhat jbosseapxp |
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| References |
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Wed, 11 Feb 2026 22:15:00 +0000
| Type | Values Removed | Values Added |
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| First Time appeared |
Keycloak
Keycloak keycloak-quarkus-server |
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| Vendors & Products |
Keycloak
Keycloak keycloak-quarkus-server |
Tue, 10 Feb 2026 00:15:00 +0000
| Type | Values Removed | Values Added |
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| 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. | |
| Title | org.keycloak/keycloak-quarkus-server: Keycloak: Unauthorized Access via JWT authorization grant with disabled users | |
| Weaknesses | CWE-284 | |
| References |
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| Metrics |
threat_severity
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cvssV3_1
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Status: PUBLISHED
Assigner: redhat
Published:
Updated: 2026-07-16T15:11:51.549Z
Reserved: 2026-01-29T12:08:57.214Z
Link: CVE-2026-1609
Updated: 2026-07-16T12:04:37.270Z
No data.
OpenCVE Enrichment
Updated: 2026-02-11T22:00:54Z