{"cve":"CVE-2024-1249","nvd":{"published":"2024-04-17T14:15:08.160","modified":"2026-10-27T03:16:26.273","status":"Deferred","description":"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.","cvss_v4":null,"cvss_v3":{"version":"3.1","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:N/I:N/A:H","score":7.4},"cwes":["CWE-346"],"references":["https://access.redhat.com/errata/RHSA-2024:1860","https://access.redhat.com/errata/RHSA-2024:1861","https://access.redhat.com/errata/RHSA-2024:1862","https://access.redhat.com/errata/RHSA-2024:1864","https://access.redhat.com/errata/RHSA-2024:1866"],"products":[],"source":"nvd","synced_at":"2026-10-27T03:31:28.089634185+00:00"},"epss":{"cve":"CVE-2024-1249","score":0.00448,"percentile":0.38683,"date":"2026-10-26"},"kev":null,"osv":[{"id":"GHSA-m6q9-p373-g5q8","url":"https://osv.dev/vulnerability/GHSA-m6q9-p373-g5q8","summary":"Keycloak's unvalidated cross-origin messages in checkLoginIframe leads to DDoS","modified":"2026-09-10T03:50:12.969495825Z","packages":[{"ecosystem":"Maven","name":"org.keycloak:keycloak-services","purl":"pkg:maven/org.keycloak/keycloak-services","ranges":["<22.0.10"],"fixed":["22.0.10"]},{"ecosystem":"Maven","name":"org.keycloak:keycloak-services","purl":"pkg:maven/org.keycloak/keycloak-services","ranges":[">=23.0.0 <24.0.3"],"fixed":["24.0.3"]}]}],"attribution":["This product uses the NVD API but is not endorsed or certified by the NVD.","EPSS scores: FIRST Exploit Prediction Scoring System, https://www.first.org/epss","Known exploited vulnerabilities: CISA Known Exploited Vulnerabilities Catalog, https://www.cisa.gov/known-exploited-vulnerabilities-catalog","Package advisories: OSV (https://osv.dev), from the GitHub Advisory Database, PyPA, Go, RustSec and other ecosystem databases, under CC-BY 4.0 or CC0","CVE records: the CVE Program's CVE List (https://www.cve.org), under its terms of use (https://www.cve.org/Legal/TermsOfUse). CVE is a registered trademark of The MITRE Corporation; this product is not affiliated with the CVE Program."]}