RHSA-2026:68276 - Security Advisory

Topic

New images are available for Red Hat build of Keycloak 26.4.16 and Red Hat build of Keycloak 26.4.16 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 26.4.16 clusters.

This erratum releases new images for Red Hat build of Keycloak
26.4.16 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:

• Privilege escalation via impersonation role allows takeover of realm administrator accounts (CVE-2026-17526)
• SAML Redirect DEFLATE helpers leak native zlib state (CVE-2026-18212)
• Broker-originated username collision causes account lockout (CVE-2026-19607)
• Incomplete fix for arbitrary filesystem path probing via keystore parameters (CVE-2026-19729)
• TLS hostname verification bypass via OpenSSL client path misconfiguration (CVE-2026-62243)
• Incomplete fix for CVE-2026-15573 allows policy enforcer bypass via percent-encoded URI segments (CVE-2026-74909)
• unauthenticated DoS via unbounded locale caching (CVE-2026-79651)

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-2026-11822
• CVE-2026-11824
• CVE-2026-17526
• CVE-2026-18212
• CVE-2026-19607
• CVE-2026-19729
• CVE-2026-54371
• CVE-2026-56392
• CVE-2026-60589
• CVE-2026-61308
• CVE-2026-62243
• CVE-2026-70907
• CVE-2026-74909
• CVE-2026-79651

References

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