| Package | Affected versions | Patched versions |
|---|---|---|
| build of keycloak | ≥ 26.6, < 26.6.5 | 26.6.5 |
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.
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