Issued:
2026-04-02
Updated:
2026-04-02

RHSA-2026:6477 - Important: Red Hat build of Keycloak 26.4.11 Update

Synopsis

Important: Red Hat build of Keycloak 26.4.11 Update

Type/Severity

Security Advisory Important

Topic

New Red Hat build of Keycloak 26.4.11 packages are available from the Customer Portal

Description

Red Hat build of Keycloak 26.4.11 is a standalone server, based on the Keycloak project, that provides authentication and standards-based single sign-on capabilities for web and mobile applications.

Security fixes:

  • Keycloak Admin REST API: Improper Access Control leads to sensitive role metadata information disclosure (CVE-2025-14082)
  • Improper Access Control in Admin REST API leads to information disclosure (CVE-2025-14083)
  • keycloak-rhel9-operator: Keycloak IDOR in realm client creating/deleting (CVE-2025-14777)
  • Keycloak Refresh Token Reuse Bypass via TOCTOU Race Condition (CVE-2026-1035)
  • Blind Server-Side Request Forgery (SSRF) in Keycloak OIDC Dynamic Client Registration via jwks_uri (CVE-2026-1180)
  • Information Disclosure via improper role enforcement in UMA 2.0 Protection API (CVE-2026-3190)
  • Privilege escalation via manage-clients permission (CVE-2026-3121)
  • Information disclosure due to redirect_uri validation bypass (CVE-2026-3872)
  • Information disclosure of disabled user attributes via administrative endpoint (CVE-2026-3911)
  • Improper Access Control Leading to MFA Deletion and Account Takeover in Keycloak Account REST API (CVE-2026-3429)
  • Information disclosure via authorization bypass in Admin API (CVE-2026-2366)
  • Replay of action tokens via improper handling of single-use entries (CVE-2026-4325)
  • UMA policy bypass allows authenticated users to gain unauthorized access to victim-owned resources (CVE-2026-4636)
  • Privilege escalation via forged authorization codes due to SingleUseObjectProvider isolation flaw (CVE-2026-4282)
  • Denial of Service via excessive processing of OpenID Connect scope parameters (CVE-2026-4634)

Solution

Before applying the update, back up your existing installation, including all applications, configuration files, databases and database settings, and so on.

Affected Products

ProductVersionArch
Red Hat build of KeycloakText-only Advisoriesx86_64

Fixes

(none)

CVEs

References

Additional information