Description (CNA)
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.
Affected (CNA)
| Vendor / product | Versions |
|---|---|
| Red Hat / Red Hat build of Keycloak 26.6 | unaffected 26.6.5-1 before * |
| Red Hat / Red Hat build of Keycloak 26.6 | unaffected 26.6-11 before * |
| Red Hat / Red Hat build of Keycloak 26.6 | unaffected 26.6-11 before * |
| Red Hat / Red Hat build of Keycloak 26.6.5 | unaffected |
| Red Hat / Red Hat build of Keycloak 26.6.5 | unaffected |
| Red Hat / Red Hat build of Keycloak 26.6.5 | unaffected |
| Red Hat / Red Hat Data Grid 8 | unaffected |
| Red Hat / Red Hat JBoss Enterprise Application Platform Expansion Pack | unaffected |
| Red Hat / Red Hat Single Sign-On 7 | unaffected |
CWE
CWE-770
References
- https://access.redhat.com/errata/RHSA-2026:50848
- https://access.redhat.com/errata/RHSA-2026:50849
- https://access.redhat.com/security/cve/CVE-2026-16100
- https://bugzilla.redhat.com/show_bug.cgi?id=2501730
ADP enrichment
No English description supplied.
No references supplied.