Keycloak 26.6.4 released

June 26 2026

To download the release go to Keycloak downloads.

Upgrading

Before upgrading refer to the migration guide for a complete list of changes.

#50344 CVE-2026-9099 Keycloak: group-admin escalation to realm-admin
#50345 CVE-2026-9083 Keycloak: keycloak: information disclosure through arbitrary filesystem path probing
#50347 CVE-2026-9086 Keycloak: keycloak: cross-site scripting (xss) via case-insensitive uri validation bypass
#50349 CVE-2026-9705 Keycloak: keycloak: attacker can re-enable and take over disabled clients via registration access token
#50350 CVE-2026-9795 Keycloak: keycloak: privilege escalation via improper scope mapping enforcement
#50351 CVE-2026-9799 Keycloak: keycloak: unauthorized access to resources via uma permission ticket bypass
#50352 CVE-2026-9800 Keycloak: keycloak policy enforcer: authorization bypass via incorrect uri comparison
#50357 CVE-2026-11800 Keycloak: Authentication bypass via JWT algorithm confusion