RHSA-2026:56524 - Security Advisory

Topic

New images are available for Red Hat build of Keycloak 26.6.6 and
Red Hat build of Keycloak 26.6.6 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 26.6.6 clusters.

This erratum releases new images for Red Hat build of Keycloak
26.6.6 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:

• FGAP v2 role groups endpoint discloses hidden group metadata without group view permission (CVE-2026-14613)
• Predictable account-linking hash enables account takeover via malicious OIDC client (CVE-2026-15571)
• Vault-resolved rotated client secrets leaked via Admin REST API (CVE-2026-17048)
• Unauthenticated account takeover via reset-credentials flow bypass (CVE-2026-18963)
• Privilege escalation via Time-of-Check to Time-of-Use (TOCTOU) vulnerability (CVE-2026-9796)

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-2026-9796
• CVE-2026-13757
• CVE-2026-14613
• CVE-2026-15571
• CVE-2026-17048
• CVE-2026-18963

References

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