This page tracks the Ubuntu fix status. The vulnerability itself is described on the main CVE page.
View CVE-2026-101333 →
UBUNTU-CVE-2026-101333
A flaw was found in the Micrometer user-event metrics listener of Keycloak, a solution for integrated identity and access management. The issue occurs...
Original description
The description as published by the source.
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: OSV.dev (Open Source Vulnerabilities) OSV
Affected packages
Ubuntu:24.04:LTS
python-keycloak
[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}]
Ubuntu:26.10
python-keycloak
[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}]
References
- report ubuntu.com
- report cve.org
- report access.redhat.com
- report bugzilla.redhat.com