CVE-2025-11419

HighCVSS 7.5/10Last modified Oct 19, 2026

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.

Metrics

CVSS 3.1 7.5/10CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Weakness enumeration

CWE-770

Affected software

Vendor	Product	Versions
—	—	< 26.0.16; >= 26.2.0, < 26.2.10; >= 26.4.0, < 26.4.1
Red Hat	Red Hat build of Keycloak 26.0	—
Red Hat	Red Hat build of Keycloak 26.0	—
Red Hat	Red Hat build of Keycloak 26.0	—
Red Hat	Red Hat build of Keycloak 26.0.16	—
Red Hat	Red Hat build of Keycloak 26.2	—
Red Hat	Red Hat build of Keycloak 26.2	—
Red Hat	Red Hat build of Keycloak 26.2	—
Red Hat	Red Hat build of Keycloak 26.2.10	—

References

Timeline

Published: Dec 23, 2025
Last modified: Oct 19, 2026
NVD status: Deferred

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