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 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 v3 5.3 MEDIUM

5.3^/10

CVSS v3 : MEDIUM

Vector :

Exploitability : 3.9 / Impact : 1.4

Attack Vector NETWORK

Attack Complexity LOW

Privileges Required NONE

User Interaction NONE

Confidentiality Impact NONE

Integrity Impact NONE

Availability Impact LOW

Scope UNCHANGED

References

Link	Resource
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

Configurations

No configuration.

History

16 Sep 2026, 16:17

Type	Values Removed	Values Added
New CVE

Information

Published : 2026-09-16 16:17

Updated : 2026-09-16 19:42

NVD link : CVE-2026-19607

Mitre link : CVE-2026-19607

CVE.ORG link : CVE-2026-19607

JSON object : View

Products Affected

No product.

CWE

CWE-287

Improper Authentication

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