FKIE_CVE-2026-1609

Vulnerability from fkie_nvd - Published: 2026-07-16 01:16 - Updated: 2026-08-09 15:10
Severity
8.1 (High) - CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:N
8.1 (High) - CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:N
8.1 (High) - CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:N
Summary
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.
References
secalert@redhat.comhttps://access.redhat.com/security/cve/CVE-2026-1609Vendor Advisory
secalert@redhat.comhttps://bugzilla.redhat.com/show_bug.cgi?id=2435257Issue Tracking, Vendor Advisory
secalert@redhat.comhttps://github.com/keycloak/keycloak/issues/46144Issue Tracking
secalert@redhat.comhttps://github.com/keycloak/keycloak/releases/tag/26.5.3Release Notes
0b0ca135-0b70-47e7-9f44-1890c2a1c46chttps://access.redhat.com/security/cve/CVE-2026-1609Vendor Advisory
0b0ca135-0b70-47e7-9f44-1890c2a1c46chttps://bugzilla.redhat.com/show_bug.cgi?id=2435257Issue Tracking, Vendor Advisory
0b0ca135-0b70-47e7-9f44-1890c2a1c46chttps://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-1609.jsonVendor Advisory
Impacted products
Vendor Product Version
redhat build_of_keycloak 26.5.2
To clipboard 

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    }
  ],
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  "lastModified": "2026-08-09T15:10:59.850",
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}



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