LOW 3.7
GHSA-rhgq-f8x5-j2jc
Keycloak's identity-first login flow exposes user information
Details
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.
Are you affected?
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Affected packages
Maven / org.keycloak:keycloak-services
Introduced in:
26.5.0 Fixed in: 26.6.1 Fix
# pom.xml: bump <version>26.6.1</version> for org.keycloak:keycloak-services Maven / org.keycloak:keycloak-services
Introduced in:
0 Fixed in: 26.4.12 Fix
# pom.xml: bump <version>26.4.12</version> for org.keycloak:keycloak-services References
- https://nvd.nist.gov/vuln/detail/CVE-2026-4633 [ADVISORY]
- 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 [WEB]
- https://github.com/keycloak/keycloak [PACKAGE]