Description (CNA)
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.
Affected (CNA)
| Vendor / product | Versions |
|---|---|
| Not supplied / Not supplied | affected 0 before 26.0.16; unknown 26.1.0 before 26.1.*; affected 26.2.0 before 26.2.10; unknown 26.3.0 before 26.3.*; affected 26.4.0 before 26.4.1 |
| Red Hat / Red Hat build of Keycloak 26.0 | unaffected 26.0.16-2 before * |
| Red Hat / Red Hat build of Keycloak 26.0 | unaffected 26.0-20 before * |
| Red Hat / Red Hat build of Keycloak 26.0 | unaffected 26.0-21 before * |
| Red Hat / Red Hat build of Keycloak 26.0.16 | unaffected |
| Red Hat / Red Hat build of Keycloak 26.2 | unaffected 26.2.10-2 before * |
| Red Hat / Red Hat build of Keycloak 26.2 | unaffected 26.2-11 before * |
| Red Hat / Red Hat build of Keycloak 26.2 | unaffected 26.2-11 before * |
| Red Hat / Red Hat build of Keycloak 26.2.10 | unaffected |
CWE
CWE-770
References
- https://access.redhat.com/errata/RHSA-2025:18254
- https://access.redhat.com/errata/RHSA-2025:18255
- https://access.redhat.com/errata/RHSA-2025:18889
- https://access.redhat.com/errata/RHSA-2025:18890
- https://access.redhat.com/security/cve/CVE-2025-11419
- https://bugzilla.redhat.com/show_bug.cgi?id=2402142
- https://github.com/keycloak/keycloak/discussions/25209
- https://github.com/keycloak/keycloak/issues/43020
ADP enrichment
No English description supplied.
No references supplied.