CVE-2025-11419 HIGH

CVE-2025-11419: Keycloak: keycloak tls client-initiated renegotiation denial of service

Vendor Red Hat
Product Red Hat build of Keycloak 26.0.16
Weakness CWE-770 · Uncontrolled resource consumption
Published December 23, 2025
Last update April 20, 2026
View on NVD All CVEs

CVSS base score

7.5/10
Attack vector Network
Attack complexity Low
Privileges required None
User interaction None
Confidentiality None
Integrity None

CVSS vector

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

What the vulnerability does

01Description

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.

Key dates

02Disclosure timeline

December 23, 2025 CVE published
April 20, 2026 Record updated