{"id":"CVE-2024-1249","aliases":["GHSA-m6q9-p373-g5q8"],"url":"https://o3.security/vulnerability/CVE-2024-1249","summary":"Keycloak: org.keycloak.protocol.oidc: unvalidated cross-origin messages in checkloginiframe leads to ddos","details":"A flaw was found in Keycloak's OIDC component in the \"checkLoginIframe,\" which allows unvalidated cross-origin messages. This flaw allows attackers to coordinate and send millions of requests in seconds using simple code, significantly impacting the application's availability without proper origin validation for incoming messages.","published":"2024-04-17T13:22:48.335Z","modified":"2026-09-10T03:30:31.446927721Z","cvss":{"score":7.4,"severity":"HIGH","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:N/I:N/A:H"},"epss":{"score":0.00448,"percentile":0.37432,"asOf":"2026-08-23"},"cisaKev":null,"exploitsKnown":0,"affectedPackages":[{"ecosystem":"Maven","name":"org.keycloak:keycloak-services","fixedVersion":"22.0.10"},{"ecosystem":"Maven","name":"org.keycloak:keycloak-services","fixedVersion":"24.0.3"}],"fix":null,"references":[{"type":"WEB","url":"https://access.redhat.com/downloads/content/package-browser/"},{"type":"WEB","url":"https://access.redhat.com/jbossnetwork/restricted/listSoftware.html"},{"type":"WEB","url":"https://catalog.redhat.com/software/containers/"},{"type":"ADVISORY","url":"https://access.redhat.com/errata/RHSA-2024:1860"},{"type":"ADVISORY","url":"https://access.redhat.com/errata/RHSA-2024:1861"},{"type":"ADVISORY","url":"https://access.redhat.com/errata/RHSA-2024:1862"},{"type":"ADVISORY","url":"https://access.redhat.com/errata/RHSA-2024:1864"},{"type":"ADVISORY","url":"https://access.redhat.com/errata/RHSA-2024:1866"},{"type":"ADVISORY","url":"https://access.redhat.com/errata/RHSA-2024:1867"},{"type":"ADVISORY","url":"https://access.redhat.com/errata/RHSA-2024:1868"},{"type":"ADVISORY","url":"https://access.redhat.com/errata/RHSA-2024:2945"},{"type":"ADVISORY","url":"https://access.redhat.com/errata/RHSA-2024:4057"},{"type":"ADVISORY","url":"https://access.redhat.com/security/cve/CVE-2024-1249"},{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2024/1xxx/CVE-2024-1249.json"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2024-1249"},{"type":"REPORT","url":"https://bugzilla.redhat.com/show_bug.cgi?id=2262918"},{"type":"PACKAGE","url":"https://github.com/keycloak/keycloak"}],"provenance":{"sources":["OSV.dev","FIRST.org (EPSS)"],"lastVerified":"2026-09-10T03:30:31.446927721Z"}}