This page tracks the Ubuntu fix status. The vulnerability itself is described on the main CVE page.
View CVE-2026-19607 →
UBUNTU-CVE-2026-19607
A flaw was found in the first-broker-login flow of the keycloak-services component. This component handles the initial authentication and account link...
Original description
The description as published by the source.
A flaw was found in the first-broker-login flow of the keycloak-services component. This component handles the initial authentication and account linking when a user logs in via an external identity provider. The issue allows an attacker to register a matching username on an external provider to trigger a collision in Keycloak, which results in the legitimate user being locked out of their account.
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