PT-2026-44193 · Red Hat · Red Hat Build Of Keycloak

Published 2026-05-28 · Updated 2026-05-28 · CVE-2026-9798

Mitre

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 Keycloak, an open-source identity and access management solution. When a user account is temporarily locked due to repeated failed login attempts, an attacker with valid client credentials can exploit the Client-Initiated Backchannel Authentication (CIBA) flow to bypass this brute-force protection. This allows continued authentication attempts and token issuance even when the account should be locked, potentially enabling further unauthorized access attempts.

Fix

Weakness Enumeration

CWE-305

Related Identifiers

CVE-2026-9798

Affected Products

Red Hat Build Of Keycloak

References · 3

• https://nvd.nist.gov/vuln/detail/CVE-2026-9798 · Security Note
• https://bugzilla.redhat.com/show_bug.cgi?id=2482470 · Note
• https://access.redhat.com/security/cve/CVE-2026-9798 · Note