Affected: Red Hat build of Keycloak 26.2, Red Hat build of Keycloak 26.2.13, Red Hat build of Keycloak 26.4, Red Hat build of Keycloak 26.4.9

A flaw was found in Keycloak. An attacker can exploit this vulnerability by modifying the organization ID and target email within a legitimate invitation token's JSON Web Token (JWT) payload. This lack of cryptographic signature verification allows the attacker to successfully self-register into an unauthorized organization, leading to unauthorized access.