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

7.5 / 10

HIGH

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

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.

Basic Information

ID CVE-2025-11419

Source redhat

Published Dec 23, 2025 at 20:42

Modified Dec 23, 2025 at 20:52

Affected Product

Version 26.4.0

Affected Versions 0
26.2.0
26.4.0

CWE Classification

CWE-770

References

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    "published": "2025-12-23T20:42:38.699Z",
    "modified": "2025-12-23T20:52:40.059Z",
    "type": "cve",
    "title": "Keycloak: keycloak tls client-initiated renegotiation denial of service",
    "source": "redhat",
    "references": "https://access.redhat.com/errata/RHSA-2025:18254\nhttps://access.redhat.com/errata/RHSA-2025:18255\nhttps://access.redhat.com/errata/RHSA-2025:18889\nhttps://access.redhat.com/errata/RHSA-2025:18890\nhttps://access.redhat.com/security/cve/CVE-2025-11419\nhttps://bugzilla.redhat.com/show_bug.cgi?id=2402142",
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    "cvss": {
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        "cvssV3": {
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