VULNERABILITY INTELLIGENCE

CVE-2026-16100

CVSS score6.5 MEDIUM
EPSS probability0.55%
CISA KEVNot currently listed
Published2026-08-05
Last modified2026-08-31
CVSS vectorCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

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.

Weakness classification

  • secalert@redhat.com: CWE-770
  • 134c704f-9b21-4f2e-91b3-4a467353bcc0: CWE-770

Primary references