MEDIUM

CVE-2026-19607

2026-09-16 CVSS v3.1

CVSS

5.3

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.

Weakness (CWE)

CWE-287 Improper Authentication

EPSS Score

0.51%

Probability of exploitation in next 30 days

42.2th percentile

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

View on dbcve.org

Base CVE data derived from NVD (public domain). Enrichment by dbcve.org (CC-BY-4.0). Fetched via API.

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