CVE-2026-19607
mediumA flaw was found in the first-broker-login flow of the keycloak-services component.
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
5.3
5.3 (CVSS v3.1)
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L Severity source: NVD CVSS v3.1 (secalert@redhat.com)
Timeline (UTC)
Published: 2026-09-16 16:17
Modified: 2026-09-16 19:42
NVD status: Awaiting Analysis
Last synced 3 days ago
Verified against the source API 2026-10-27 06:54 UTC
Exploitation
Not listed in CISA KEV (as of last catalog sync)
Absence from KEV does not mean a CVE is not exploited. Exploitation status: unknown (no authoritative evidence in our sources).
Affected products
Not reported by the source (unknown — not "none").
Weakness classification (CWE)
Source: NVD / CISA. “NVD-CWE-Other” and “NVD-CWE-noinfo” mean NVD could not assign a specific weakness.
Mitigation & advisories
No vendor advisory or patch reference tagged by NVD. Check the references below.
References
- https://access.redhat.com/errata/RHSA-2026:68276 secalert@redhat.com
- https://access.redhat.com/errata/RHSA-2026:68277 secalert@redhat.com
- https://access.redhat.com/errata/RHSA-2026:68278 secalert@redhat.com
- https://access.redhat.com/errata/RHSA-2026:68280 secalert@redhat.com
- https://access.redhat.com/security/cve/CVE-2026-19607 secalert@redhat.com
- https://bugzilla.redhat.com/show_bug.cgi?id=2514529 secalert@redhat.com
Data sources
NVD CVE API 2.0 — fetched 2026-10-27 06:54 UTC · record ↗