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.
History

Tue, 23 Dec 2025 21:15:00 +0000

Type Values Removed Values Added
Metrics ssvc

{'options': {'Automatable': 'yes', 'Exploitation': 'none', 'Technical Impact': 'partial'}, 'version': '2.0.3'}


Tue, 23 Dec 2025 20:45:00 +0000

Type Values Removed Values Added
Description No description is available for this CVE. 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.
Title keycloak: Keycloak TLS Client-Initiated Renegotiation Denial of Service Keycloak: keycloak tls client-initiated renegotiation denial of service
First Time appeared Redhat
Redhat build Keycloak
CPEs cpe:/a:redhat:build_keycloak:26.0
cpe:/a:redhat:build_keycloak:26.0::el9
cpe:/a:redhat:build_keycloak:26.2::el9
Vendors & Products Redhat
Redhat build Keycloak
References

Wed, 08 Oct 2025 00:15:00 +0000

Type Values Removed Values Added
Description No description is available for this CVE.
Title keycloak: Keycloak TLS Client-Initiated Renegotiation Denial of Service
Weaknesses CWE-770
References
Metrics threat_severity

None

cvssV3_1

{'score': 7.5, 'vector': 'CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H'}

threat_severity

Important


cve-icon MITRE

Status: PUBLISHED

Assigner: redhat

Published:

Updated: 2025-12-23T20:52:40.059Z

Reserved: 2025-10-07T11:19:18.134Z

Link: CVE-2025-11419

cve-icon Vulnrichment

Updated: 2025-12-23T20:52:32.002Z

cve-icon NVD

Status : Received

Published: 2025-12-23T21:15:46.557

Modified: 2025-12-23T21:15:46.557

Link: CVE-2025-11419

cve-icon Redhat

Severity : Important

Publid Date: 2025-10-07T00:00:00Z

Links: CVE-2025-11419 - Bugzilla

cve-icon OpenCVE Enrichment

No data.