High 8.1Published Jul 16, 2026

CVE-2026-1609A flaw was found in Keycloak.

Updated under an hour ago (2026-10-19 08:50 UTC)

Does this affect you?

It affects redhat build_of_keycloak. Add what you run to find out whether that includes you.

No exploitation reported and no EPSS estimate yet.

Do this next

Start free and add your stack

Free account, 1 product

Every CVE for redhat build_of_keycloak

Exploited in the last 30 days

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.

CVSS: 8.1 HIGH (v3.1, NVD)CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:N
Weakness (CWE): CWE-284
Known exploited: Not in CISA's KEV catalog
EPSS (exploitation in the next 30 days): Not loaded for this CVE
Assigned by: Not given
NVD analysis: Analyzed
Record last updated: Aug 9, 2026
First seen by InfoSec Signals: Oct 9, 2026

Affected products

Affected products

redhat build_of_keycloak redhat:build_of_keycloak	26.5.2	NVD

References

https://access.redhat.com/security/cve/CVE-2026-1609vendor-advisory
https://bugzilla.redhat.com/show_bug.cgi?id=2435257issue-tracking, vendor-advisory
https://github.com/keycloak/keycloak/issues/46144issue-tracking
https://github.com/keycloak/keycloak/releases/tag/26.5.3release-notes
https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-1609.jsonvendor-advisory

The CVE record on cve.org NVD's entry

The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.