LOW 3.7 Maven
Keycloak's identity-first login flow exposes user information
GHSA-rhgq-f8x5-j2jc · CVE-2026-4633
Published · Modified
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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.
References
- ADVISORY https://nvd.nist.gov/vuln/detail/CVE-2026-4633
- WEB https://github.com/keycloak/keycloak/issues/47619
- WEB https://github.com/keycloak/keycloak/pull/47635
- WEB https://github.com/keycloak/keycloak/commit/b137016cc6dcfd9f59b2aa2e6d73af8b0ebf7c6e
- WEB https://github.com/keycloak/keycloak/commit/b4558a874fa79341404ae4d2d8f240f22bfed340
- WEB https://access.redhat.com/security/cve/CVE-2026-4633
- WEB https://bugzilla.redhat.com/show_bug.cgi?id=2450247
- PACKAGE https://github.com/keycloak/keycloak
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