RHSA-2026:19597 - Security Advisory

Topic

New images are available for Red Hat build of Keycloak 26.4.12 and Red Hat build of Keycloak 26.4.12 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 26.4.12 clusters.

This erratum releases new images for Red Hat build of Keycloak 26.4.12 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:

• Denial of Service via specially crafted SAML input (CVE-2026-7307)
• Information Disclosure via evaluate-scopes Admin API (CVE-2026-37978)
• Unauthorized account takeover via WebAuthn token replay (CVE-2026-37982)
• Information disclosure via OIDC token introspection endpoint audience bypass (CVE-2026-37979)
• Access token disclosure and implicit flow bypass via forged client data (CVE-2026-7571)
• Session fixation in OIDC login flow that can lead to account takeover (CVE-2026-7507)
• Open redirect when using wildcard valid redirect URIs in Keycloak (CVE-2026-7504)
• Information disclosure via broken access control in user lookup endpoint (CVE-2026-37981)
• Unauthorized resource access and data modification via Insecure Direct Object Reference (CVE-2026-4630)

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-2026-4630
• CVE-2026-4878
• CVE-2026-7307
• CVE-2026-7504
• CVE-2026-7507
• CVE-2026-7571
• CVE-2026-37978
• CVE-2026-37979
• CVE-2026-37981
• CVE-2026-37982

References

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