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CVE PROGRAM SOURCE RECORD3.7 Low

CVE-2026-4633

Keycloak: keycloak: user enumeration via differential error messages

Description

A flaw was found in Keycloak. A remote attacker can exploit differential error messages during the identity-first login flow when Organizations are enabled. This vulnerability allows an attacker to determine the existence of users, leading to information disclosure through user enumeration.

Affected products

Version statuses are supplied by the assigning organization. Consult the original record for detailed ranges and platform conditions.

Red Hat Red Hat build of Keycloak 26.4.12

Default version status: unaffected

Red Hat Red Hat Build of Keycloak

Default version status: affected

References