{"id":"CVE-2025-11419","summary":"Keycloak: keycloak tls client-initiated renegotiation denial of service","details":"A flaw was found in Keycloak. This vulnerability allows an unauthenticated remote attacker to cause a denial of service (DoS) by repeatedly initiating TLS 1.2 client-initiated renegotiation requests to exhaust server CPU resources, making the service unavailable.","aliases":["GHSA-q8hq-4h99-fj7x"],"modified":"2026-07-16T03:47:22.271416758Z","published":"2025-12-23T20:42:38.699Z","database_specific":{"cwe_ids":["CWE-770"],"osv_generated_from":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2025/11xxx/CVE-2025-11419.json","cna_assigner":"redhat"},"references":[{"type":"WEB","url":"https://access.redhat.com/downloads/content/package-browser/"},{"type":"WEB","url":"https://catalog.redhat.com/software/containers/"},{"type":"WEB","url":"https://github.com/keycloak/keycloak/"},{"type":"WEB","url":"https://github.com/keycloak/keycloak/discussions/25209"},{"type":"ADVISORY","url":"https://access.redhat.com/errata/RHSA-2025:18254"},{"type":"ADVISORY","url":"https://access.redhat.com/errata/RHSA-2025:18255"},{"type":"ADVISORY","url":"https://access.redhat.com/errata/RHSA-2025:18889"},{"type":"ADVISORY","url":"https://access.redhat.com/errata/RHSA-2025:18890"},{"type":"ADVISORY","url":"https://access.redhat.com/security/cve/CVE-2025-11419"},{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2025/11xxx/CVE-2025-11419.json"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2025-11419"},{"type":"REPORT","url":"https://bugzilla.redhat.com/show_bug.cgi?id=2402142"},{"type":"REPORT","url":"https://github.com/keycloak/keycloak/issues/43020"}],"affected":[{"ranges":[{"type":"GIT","repo":"https://github.com/keycloak/keycloak","events":[{"introduced":"0"},{"fixed":"78fa91620bbab9271d3a6f4ad7bb804140af0096"},{"introduced":"4cb4d2d06ed17e3a8bd928f472d3f9e4d1adea1d"},{"fixed":"282b8a2ba6d6135a7de661a707d30a23866b941a"},{"introduced":"4e25e47b3c3619b3a0593448e1dfc0dd786cfbe1"},{"fixed":"802e43c58ee8989a1beb8e5d905aa73c1ca21e4b"}],"database_specific":{"source":"AFFECTED_FIELD","extracted_events":[{"introduced":"0"},{"fixed":"26.0.16"},{"introduced":"26.2.0"},{"fixed":"26.2.10"},{"introduced":"26.4.0"},{"fixed":"26.4.1"}]}}],"versions":["2.4.0.Test","1.3.0.Final","1.1.0.Beta2","1.0.0.Final","1.0-final","1.0-rc-1","1.0-beta-4","1.0-beta-2","1.0-beta-1","1.0-alpha-3","1.0-alpha-2","1.0-alpha-1","1.0-alpha-1-12062013"],"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2025-11419.json"}}],"schema_version":"1.7.5","severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H"}]}