{"cve":"CVE-2025-11419","nvd":{"published":"2025-12-23T21:15:46.557","modified":"2026-10-19T22:10:00.130","status":"Deferred","description":"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.","cvss_v4":null,"cvss_v3":{"version":"3.1","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","score":7.5},"cwes":["CWE-770"],"references":["https://access.redhat.com/errata/RHSA-2025:18254","https://access.redhat.com/errata/RHSA-2025:18255","https://access.redhat.com/errata/RHSA-2025:18889","https://access.redhat.com/errata/RHSA-2025:18890","https://access.redhat.com/security/cve/CVE-2025-11419"],"products":[],"source":"nvd","synced_at":"2026-10-21T03:43:09.190223697+00:00"},"epss":{"cve":"CVE-2025-11419","score":0.00718,"percentile":0.53596,"date":"2026-10-26"},"kev":null,"osv":[{"id":"GHSA-q8hq-4h99-fj7x","url":"https://osv.dev/vulnerability/GHSA-q8hq-4h99-fj7x","summary":"Keycloak TLS Client-Initiated Renegotiation Denial of Service","modified":"2026-05-05T15:56:03.985430Z","packages":[{"ecosystem":"Maven","name":"org.keycloak:keycloak-quarkus-dist","purl":"pkg:maven/org.keycloak/keycloak-quarkus-dist","ranges":["<26.0.16"],"fixed":["26.0.16"]},{"ecosystem":"Maven","name":"org.keycloak:keycloak-quarkus-dist","purl":"pkg:maven/org.keycloak/keycloak-quarkus-dist","ranges":[">=26.1.0 <26.2.10"],"fixed":["26.2.10"]},{"ecosystem":"Maven","name":"org.keycloak:keycloak-quarkus-dist","purl":"pkg:maven/org.keycloak/keycloak-quarkus-dist","ranges":[">=26.3.0 <26.4.1"],"fixed":["26.4.1"]}]}],"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."]}