High 7.5Published Dec 23, 2025

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

Updated under an hour ago (Oct 27, 2026, 9:50 PM ET)

Does this affect you?

It affects Red Hat build of Keycloak 26.0. Add what you run to find out whether that includes you.

No exploitation reported and no EPSS estimate yet.

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Every CVE for Red Hat build of Keycloak 26.0

Exploited in the last 30 days

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.

CVSS: 7.5 HIGH (v3.1, CNA)CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Weakness (CWE): CWE-770
Known exploited: Not in CISA's KEV catalog
EPSS (exploitation in the next 30 days): Not loaded for this CVE
Assigned by: redhat
NVD analysis: Deferred
Record last updated: Apr 20, 2026
First seen by InfoSec Signals: Oct 9, 2026

Affected products

Affected products

Red Hat Red Hat build of Keycloak 26.0 redhat:build_keycloak	from 26.0.16-2 not affected	CNA record

References

References

https://access.redhat.com/errata/RHSA-2025:18254	vendor-advisory, x-refsource-redhat
https://access.redhat.com/errata/RHSA-2025:18255	vendor-advisory, x-refsource-redhat
https://access.redhat.com/errata/RHSA-2025:18889	vendor-advisory, x-refsource-redhat
https://access.redhat.com/errata/RHSA-2025:18890	vendor-advisory, x-refsource-redhat
https://access.redhat.com/security/cve/CVE-2025-11419	vdb-entry, x-refsource-redhat
https://bugzilla.redhat.com/show_bug.cgi?id=2402142	issue-tracking, x-refsource-redhat
https://github.com/keycloak/keycloak/discussions/25209
https://github.com/keycloak/keycloak/issues/43020

The CVE record on cve.org NVD's entry

The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.