Description (CNA)
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.
Affected (CNA)
| Vendor / product | Versions |
|---|---|
| Red Hat / Red Hat build of Keycloak 26.4 | unaffected 26.4.16-2 before * |
| Red Hat / Red Hat build of Keycloak 26.4 | unaffected 26.4-26 before * |
| Red Hat / Red Hat build of Keycloak 26.4 | unaffected 26.4-26 before * |
| Red Hat / Red Hat build of Keycloak 26.4.16 | unaffected |
| Red Hat / Red Hat build of Keycloak 26.4.16 | unaffected |
| Red Hat / Red Hat build of Keycloak 26.6 | unaffected 26.6.7-3 before * |
| Red Hat / Red Hat build of Keycloak 26.6 | unaffected 26.6-20 before * |
| Red Hat / Red Hat build of Keycloak 26.6 | unaffected 26.6-20 before * |
| Red Hat / Red Hat build of Keycloak 26.6.7 | unaffected |
| Red Hat / Red Hat build of Keycloak 26.6.7 | unaffected |
| Red Hat / Red Hat Single Sign-On 7 | unaffected |
CWE
CWE-287
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
ADP enrichment
No English description supplied.
No references supplied.