{"id":"CVE-2026-4633","revision":"9f1c1fd23e2542feba9f1906f67bc86d","records":[{"revision":"9f1c1fd23e2542feba9f1906f67bc86d","observedAt":"2026-10-23T15:48:27.903+00:00","statement":{"source":"cve-program","id":"CVE-2026-4633","aliases":[],"title":"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.","state":0,"publishedAt":"2026-03-23T10:53:35.655+00:00","modifiedAt":"2026-10-22T21:17:24.442+00:00","affected":[{"ecosystem":"https://access.redhat.com/downloads/content/package-browser/","name":"Red Hat build of Keycloak 26.4.12","ranges":[],"versions":[],"rawVersionEvidence":"{\n                    \"vendor\": \"Red Hat\",\n                    \"product\": \"Red Hat build of Keycloak 26.4.12\",\n                    \"collectionURL\": \"https://access.redhat.com/downloads/content/package-browser/\",\n                    \"defaultStatus\": \"unaffected\",\n                    \"cpes\": [\n                        \"cpe:/a:redhat:build_keycloak:26.4::el9\"\n                    ]\n                }"},{"ecosystem":"https://access.redhat.com/downloads/content/package-browser/","name":"rhbk/keycloak-rhel9","ranges":[],"versions":[],"rawVersionEvidence":"{\n                    \"vendor\": \"Red Hat\",\n                    \"product\": \"Red Hat Build of Keycloak\",\n                    \"collectionURL\": \"https://access.redhat.com/downloads/content/package-browser/\",\n                    \"packageName\": \"rhbk/keycloak-rhel9\",\n                    \"defaultStatus\": \"affected\",\n                    \"cpes\": [\n                        \"cpe:/a:redhat:build_keycloak:\"\n                    ]\n                }"}],"metrics":[{"system":"CVSS 3.1","vector":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:N/A:N","score":3.7,"severity":"LOW"}],"references":["https://access.redhat.com/errata/RHSA-2026:19596","https://access.redhat.com/security/cve/CVE-2026-4633","https://bugzilla.redhat.com/show_bug.cgi?id=2450247"],"sourceUrl":"https://www.cve.org/CVERecord?id=CVE-2026-4633","license":"CVE Program Terms of Use","key":"cve-program:CVE-2026-4633","identifiers":["CVE-2026-4633"]},"retained":false,"historicalAffected":[]}],"coverage":[]}