Vulnerability Description
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.
CVSS Score
MEDIUM
Related Weaknesses (CWE)
References
- https://access.redhat.com/errata/RHSA-2026:68276
- https://access.redhat.com/errata/RHSA-2026:68277
- https://access.redhat.com/errata/RHSA-2026:68278
- https://access.redhat.com/errata/RHSA-2026:68280
- https://access.redhat.com/security/cve/CVE-2026-19607
- https://bugzilla.redhat.com/show_bug.cgi?id=2514529
FAQ
What is CVE-2026-19607?
CVE-2026-19607 is a vulnerability with a CVSS score of 5.3 (MEDIUM). 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 p...
How severe is CVE-2026-19607?
CVE-2026-19607 has been rated MEDIUM with a CVSS base score of 5.3/10. Review the CVSS metrics above for detailed severity breakdown.
Is there a patch for CVE-2026-19607?
Check the references section above for vendor advisories and patch information. Review vendor security bulletins for remediation guidance.