CVE-2026-16100 Keycloak-services: keycloak-services: unbounded metric cardinality in user event metrics via request-controlled error text

A flaw was found in the user-event metrics recording of Keycloak. When metrics are enabled, the system records raw error messages from failed account operations as Prometheus metric labels. Because these error messages can include user-supplied input like nonexistent client IDs, an authenticated...

CVE-2026-16100

CVE-2026-16100 describes a flaw in Keycloak where, when metrics are enabled, raw error messages from failed account operations are recorded as Prometheus metric labels. Because these messages may include user-supplied input (e.g., nonexistent client IDs), an authenticated user can generate an eno...

CVE-2026-16100

A flaw was found in the user-event metrics recording of Keycloak. When metrics are enabled, the system records raw error messages from failed account operations as Prometheus metric labels. Because these error messages can include user-supplied input like nonexistent client IDs, an authenticated...