PT-2026-60799 · Red Hat · Red Hat Build Of Keycloak+3

CVE-2026-16103 · Published 2026-07-17 · Updated 2026-07-17

NVD

CVSS v3.1

4.3

Medium

Base vector

AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:N/A:N

A flaw was found in the keycloak-services component of Keycloak. This issue is an incomplete fix for CVE-2026-9798, where brute-force protection checks were added to the Client-Initiated Backchannel Authentication (CIBA) initiation handler but were omitted from the token redemption handler. This allows an attacker with valid client credentials to obtain access and refresh tokens for a user account that has been locked due to brute-force protection, provided the authentication request was started before the lockout occurred and was approved by the user.

Fix

Related Identifiers

CVE-2026-16103

Affected Products

Red Hat Build Of Keycloak

Red Hat Data Grid 8

Red Hat Jboss Enterprise Application Platform Expansion Pack

Red Hat Single Sign-On 7

References · 3

• https://nvd.nist.gov/vuln/detail/CVE-2026-16103 · Security Note
• https://access.redhat.com/security/cve/CVE-2026-16103 · Note
• https://bugzilla.redhat.com/show_bug.cgi?id=2501736 · Note