Vulnerability Details 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 user can create a massive number of unique metric entries, eventually exhausting system memory and causing the service to crash or become unavailable.
Exploit prediction scoring system (EPSS) score
EPSS Score 0.003
EPSS Ranking 22.8%
CVSS Severity
CVSS v3 Score 6.5