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CVE-2025-11419

7.5 · HIGH

A flaw was found in Keycloak.

Published Dec 23, 2025CWE-770EPSS 0.71%

Overview

CVE-2025-11419 is a high-severity vulnerability. It was published on December 23, 2025 and has a CVSS 3.1 base score of 7.5 (HIGH).

This vulnerability has a CVSS 3.1 base score of 7.5, rated HIGH. It can be exploited remotely over the network. No authentication or special privileges are required for exploitation.

Technical 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.

Remediation

Check the references section for vendor advisories, patches, and mitigation guidance. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.

References

Refaccess.redhat.com/errata/RHSA-2025:18254Refaccess.redhat.com/errata/RHSA-2025:18255Refaccess.redhat.com/errata/RHSA-2025:18889Refaccess.redhat.com/errata/RHSA-2025:18890Refaccess.redhat.com/security/cve/CVE-2025-11419Refbugzilla.redhat.com/show_bug.cgi?id=2402142GitHubgithub.com/keycloak/keycloak/discussions/25209GitHubgithub.com/keycloak/keycloak/issues/43020

How CyberStrike helps

Frequently asked questions

What is CVE-2025-11419?

CVE-2025-11419 is a high-severity vulnerability. It was published on December 23, 2025 and has a CVSS 3.1 base score of 7.5 (HIGH).

How severe is CVE-2025-11419?

This vulnerability has a CVSS 3.1 base score of 7.5, rated HIGH. It can be exploited remotely over the network. No authentication or special privileges are required for exploitation.

How do I fix or remediate CVE-2025-11419?

Check the references section for vendor advisories, patches, and mitigation guidance. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.

How can CyberStrike help with CVE-2025-11419?

CyberStrike is an open-source, AI-augmented pentesting engine. Rather than flag a version number, it tests whether an issue like CVE-2025-11419 is actually reachable in your own applications and APIs, then verifies each finding before reporting it. That tells you if the weakness is a real, exploitable risk in your environment or a false positive you can safely deprioritize.

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