What is CVE-2026-1609?

CVE-2026-1609 is a high-severity vulnerability in Keycloak, classified under Improper Access Control. CVSS score: 8.1/10. Published 2026-07-16.

How severe is CVE-2026-1609?

High severity. CVSS v3 base score is 8.1 out of 10.

Vulnerability in Keycloak

CVE-2026-1609

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 r…

CVSS v3 metric

CVSS v3 base score 8.1 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:N.

Affected products

Keycloak — versions 26.5.0
Red Hat Jboss Enterprise Application Platform 8
Red Hat Jboss Enterprise Application Platform Expansion Pack

Weakness classification (CWE)

CWE-284 — Improper Access Control

References

secalert@redhat.com (x_refsource_REDHAT, vdb-entry)
secalert@redhat.com (x_refsource_REDHAT, issue-tracking)
secalert@redhat.com
secalert@redhat.com
0b0ca135-0b70-47e7-9f44-1890c2a1c46c

Frequently asked questions

What is CVE-2026-1609?: CVE-2026-1609 is a high-severity vulnerability in Keycloak, classified under Improper Access Control. CVSS score: 8.1/10. Published 2026-07-16.
How severe is CVE-2026-1609?: High severity. CVSS v3 base score is 8.1 out of 10.