CVE-2025-11419
Published: Dec 23, 2025
Modified: Apr 20, 2026
CVSS v3.1
7.5
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.
| Vendor | Product | Versions |
|---|---|---|
Unknown | keycloak | affected 0 - < 26.0.16unknown 26.1.0 - < 26.1.*affected 26.2.0 - < 26.2.10unknown 26.3.0 - < 26.3.*affected 26.4.0 - < 26.4.1 |
Red Hat | Red Hat build of Keycloak 26.0 | unaffected 26.0.16-2 - < * |
Red Hat | Red Hat build of Keycloak 26.0 | unaffected 26.0-20 - < * |
Red Hat | Red Hat build of Keycloak 26.0 | unaffected 26.0-21 - < * |
Red Hat | Red Hat build of Keycloak 26.0.16 | All versions |
Red Hat | Red Hat build of Keycloak 26.2 | unaffected 26.2.10-2 - < * |
Red Hat | Red Hat build of Keycloak 26.2 | unaffected 26.2-11 - < * |
Red Hat | Red Hat build of Keycloak 26.2 | unaffected 26.2-11 - < * |
Red Hat | Red Hat build of Keycloak 26.2.10 | All versions |
Weaknesses (CWE)
CVSS v3.1 Details
CVSS v3.1 Vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Attack Vector
Attack Complexity
Privileges Required
User Interaction
Scope
Confidentiality
Integrity
Availability
References
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