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CVE-2026-19607

Keycloak-services: keycloak-services: broker-originated username collision causes account lockout

Published
Last modified
published
Not listed in CISA KEV
1 proof of concept on GitHub
  • Exploitation: none
  • Automatable: yes
  • Technical impact: partial

Summary

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.

Timeline

  1. CVE published
  2. CISA SSVC assessment

    Exploitation: none · Automatable: yes · Technical impact: partial

  3. Record last updated

Affected versions

  • rhbk/keycloak-operator-bundle

    Version range not reported

  • rhbk/keycloak-rhel9

    Version range not reported

  • rhbk/keycloak-rhel9-operator

    Version range not reported

  • keycloak-services

    Version range not reported

  • rhbk-openshift-rhel9/rhbk-openshift-rhel9

    Version range not reported

  • rhbk/keycloak-operator-bundle

    Version range not reported

  • rhbk/keycloak-rhel9

    Version range not reported

  • rhbk/keycloak-rhel9-operator

    Version range not reported

  • keycloak-services

    Version range not reported

  • rhbk-openshift-rhel9/rhbk-openshift-rhel9

    Version range not reported

  • keycloak-services

    Version range not reported

References 7

access.redhat.com

bugzilla.redhat.com

GitHub · 7Ragnarok7/CVE-2026-19607