Vendredi 31 juillet 2026

Red Hat Build of Keycloak · Red Hat Data Grid 8 · Red Hat JBoss Enterprise Application Platform Expansion Pack · Red Hat Single Sign-On 7

A flaw was found in the keycloak-services component of Keycloak, which provides identity and access management services. The issue occurs when a realm administrator uses a wildcard domain (like *.example.com) to restrict which hosts can register or update clients. Due to improper validation, the system accepts any hostname that ends with the specified domain suffix, even if it is not a legitimate subdomain. An attacker who can control the reverse DNS of their connection can bypass these host-based restrictions, potentially allowing unauthorized client modifications.