Red Hat Product Errata RHSA-2026:25098 - Security Advisory
Issued:
2026-06-10
Updated:
2026-06-10

RHSA-2026:25098 - Security Advisory

Synopsis

Moderate: Red Hat build of Keycloak 26.6.3 Update

Type/Severity

Security Advisory: Moderate

Topic

New Red Hat build of Keycloak 26.6.3 packages are available from the Customer Portal

Description

Red Hat build of Keycloak 26.6.3 is a standalone server, based on the Keycloak project, that provides authentication and standards-based single sign-on capabilities for web and mobile applications.

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

(none)

The Red Hat security contact is secalert@redhat.com. More contact details at https://access.redhat.com/security/team/contact/.