RHSA-2026:56523CriticalCVSS 9.1

Red Hat Security Advisory: Red Hat build of Keycloak 26.6.6 Security Update

Published
August 18, 2026
Last Modified
August 20, 2026

🔗 CVE IDs covered (5)

CVE-2026-15571 →CVE-2026-17048 →CVE-2026-18963 →CVE-2026-9796 →CVE-2026-14613 →

📋 Description

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

🎯 Affected products1

  • Red Hat build of Keycloak 26.6.6

✅ Remediation

Before applying the update, back up your existing installation, including all applications, configuration files, databases and database settings, and so on. Workaround: Mitigation for this issue is either not available or the currently available options do not meet the Red Hat Product Security criteria comprising ease of use and deployment, applicability to widespread installation base, or stability. Workaround: If an immediate upgrade is not possible, disabling the "Forgot password" functionality across all realms can be used as a temporary mitigation. In the RHBK administration console, navigate to: Realm settings → Login → Forgot password → Off Apply this setting to all realms. Upgrade to a fixed version as soon as possible.

🔗 References (3)