RHSA-2026:3948 - Security Advisory

Topic

New images are available for Red Hat build of Keycloak 26.4.10 and Red Hat build of Keycloak 26.4.10 Operator, running on OpenShift Container Platform

Description

Red Hat build of Keycloak is an integrated sign-on solution, available as a Red Hat JBoss Middleware for OpenShift containerized image. The Red Hat build of Keycloak for OpenShift image provides an authentication server that you can use to log in centrally, log out, and register. You can also manage user accounts for web applications, mobile applications, and RESTful web services.
Red Hat build of Keycloak Operator for OpenShift simplifies deployment and management of Keycloak 26.4.10 clusters.
This erratum releases new images for Red Hat build of Keycloak 26.4.10 for use within the OpenShift Container Platform cloud computing Platform-as-a-Service (PaaS) for on-premise or private cloud deployments, aligning with the standalone product release.

Security fixes:

• Keycloak SAML broker: Authentication bypass due to disabled SAML client completing IdP-initiated login (CVE-2026-3047)
• Improper Enforcement of Disabled Identity Provider in IdentityBrokerService (Authentication Bypass) (CVE-2026-3009)
• Unauthorized authentication via disabled SAML Identity Provider (CVE-2026-2603)
• Unauthorized access via improper validation of encrypted SAML assertions (CVE-2026-2092)
• Missing Check on Disabled Client for Docker Registry Protocol (CVE-2026-2733)
• Denial of Service due to excessive SAMLRequest decompression (CVE-2026-2575)
• Keycloak SAML brokering: Response delay due to unchecked NotOnOrAfter in SubjectConfirmationData (CVE-2026-1190)
• Keycloak Authorization Header Parsing Leading to Potential Security Control Bypass (CVE-2026-0707)

Solution

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

Affected Products

• Red Hat build of Keycloak Text-only Advisories x86_64

Fixes

CVEs

• CVE-2025-15281
• CVE-2026-0707
• CVE-2026-0861
• CVE-2026-0915
• CVE-2026-1190
• CVE-2026-2092
• CVE-2026-2575
• CVE-2026-2603
• CVE-2026-2733
• CVE-2026-3009
• CVE-2026-3047

References

• https://access.redhat.com/security/updates/classification/#important