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CVE-2025-11419

HIGH

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.

CVE Details

CVSS v3.1 Score7.5

SeverityHIGH

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

Attack VectorNETWORK

ComplexityLOW

Privileges RequiredNONE

User InteractionNONE

Published12/23/2025

Last Modified4/20/2026

Sourcenvd

Honeypot Sightings0

Weaknesses (CWE)

CWE-770

References

https://access.redhat.com/errata/RHSA-2025:18254(secalert@redhat.com)

https://access.redhat.com/errata/RHSA-2025:18255(secalert@redhat.com)

https://access.redhat.com/errata/RHSA-2025:18889(secalert@redhat.com)

https://access.redhat.com/errata/RHSA-2025:18890(secalert@redhat.com)

https://access.redhat.com/security/cve/CVE-2025-11419(secalert@redhat.com)

https://bugzilla.redhat.com/show_bug.cgi?id=2402142(secalert@redhat.com)

https://github.com/keycloak/keycloak/discussions/25209(secalert@redhat.com)

https://github.com/keycloak/keycloak/issues/43020(secalert@redhat.com)

IOC Correlations

No correlations recorded

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