CVE-2026-101333 — Keycloak-services: keycloak-services: unbounded metric series creation via idp tag on broker login endpoint
A flaw was found in the Micrometer user-event metrics listener of Keycloak, a solution for integrated identity and access management. The issue occurs when the listener is confi…
Published: 2026-09-28 · CVSS: 3.7 · CVSS 3.1
A flaw was found in the Micrometer user-event metrics listener of Keycloak, a solution for integrated identity and access management. The issue occurs when the listener is configured to include the idp tag. An unauthenticated attacker can send requests to the identity broker login endpoint using arbitrary provider aliases, causing the system to create an unlimited number of metric time series. This can lead to excessive memory consumption and degrade the performance of both the server and its monitoring tools.
Source: CVE Program · Revision 8b16575c39f1e1810c5e863010da073d2d3285e7