CVE-2026-16100
MEDIUM
NVD
CVSS Score
6.5
Severity
MEDIUM
Published
Aug 05, 2026
Vendor
unknown
Description
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 user can create a massive number of unique metric entries, eventually exhausting system memory and causing the service to crash or become unavailable.