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.
References
| Link | Resource |
|---|---|
| https://access.redhat.com/security/cve/CVE-2026-9798 | Mitigation Vendor Advisory |
| https://bugzilla.redhat.com/show_bug.cgi?id=2482470 | Issue Tracking Vendor Advisory |
Configurations
History
03 Jun 2026, 19:38
| Type | Values Removed | Values Added |
|---|---|---|
| CPE | cpe:2.3:a:redhat:build_of_keycloak:-:*:*:*:-:*:*:* | |
| First Time |
Redhat
Redhat build Of Keycloak |
|
| References | () https://access.redhat.com/security/cve/CVE-2026-9798 - Mitigation, Vendor Advisory | |
| References | () https://bugzilla.redhat.com/show_bug.cgi?id=2482470 - Issue Tracking, Vendor Advisory |
28 May 2026, 06:16
| Type | Values Removed | Values Added |
|---|---|---|
| New CVE |
Information
Published : 2026-05-28 06:16
Updated : 2026-06-03 19:38
NVD link : CVE-2026-9798
Mitre link : CVE-2026-9798
CVE.ORG link : CVE-2026-9798
JSON object : View
Products Affected
redhat
- build_of_keycloak
CWE
CWE-305
Authentication Bypass by Primary Weakness