RHSA-2026:25097 - Security Advisory

Topic

New images are available for Red Hat build of Keycloak 26.6.3 and Red Hat build of Keycloak 26.6.3 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 26.6.3 clusters.

This erratum releases new images for Red Hat build of Keycloak 26.6.3 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:

• Security restriction bypass allows unauthorized ROPC token acquisition (CVE-2026-9792)
• Privilege escalation due to oversized subject_token JWT (CVE-2026-9704)
• Denial of Service via malformed LDAP password policy response (CVE-2026-9801)
• Denial of Service via malformed Authorization header (CVE-2026-9803)
• Organization Data Leak After Feature Disabled in Keycloak (CVE-2026-9791)
• Information disclosure via SAML ECP endpoint (CVE-2026-9794)
• Unauthorized account access via replayed refresh tokens after cluster restart (CVE-2026-9802)
• Cross-Session Email Verification Proof Not Bound to Upstream Identity in First-Broker-Login (CVE-2026-9087)
• Information disclosure due to user profile permission bypass (CVE-2026-9088)
• Policy bypass during WebAuthn credential registration via client-side JavaScript manipulation (CVE-2026-8830)
• Improper Access Control on Keycloak Server when the account Account API feature is disabled (CVE-2026-7500)
• Security flaw in org.keycloak/keycloak-services (CVE-2026-8922)
• Information disclosure via CORS header injection due to unvalidated JWT azp claim (CVE-2026-37977)
• Server-Side Request Forgery via OIDC token endpoint manipulation (CVE-2026-4874)

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-2026-4874
• CVE-2026-7500
• CVE-2026-8830
• CVE-2026-8922
• CVE-2026-9087
• CVE-2026-9088
• CVE-2026-9704
• CVE-2026-9791
• CVE-2026-9792
• CVE-2026-9794
• CVE-2026-9801
• CVE-2026-9802
• CVE-2026-9803
• CVE-2026-37977

References

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