7.5
High
CVE-2025-11419 A flaw was found in Keycloak
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.
Affected products and versions
| Product | Affected versions | Fixed in |
|---|---|---|
| Red Hat build of Keycloak 26.0 26.0 | earliest → < 26.0-21 | 26.0-21 |
| Red Hat build of Keycloak 26.0.16 | Versions not published | |
| Red Hat build of Keycloak 26.2 26.2 | earliest → < 26.2-11 | 26.2-11 |
| Red Hat build of Keycloak 26.2.10 | Versions not published |
References
- RHSA-2025:18254 access.redhat.com
- RHSA-2025:18255 access.redhat.com
- RHSA-2025:18889 access.redhat.com
- RHSA-2025:18890 access.redhat.com
- access.redhat.com access.redhat.com
- RHBZ#2402142 bugzilla.redhat.com
- github.com github.com
- github.com github.com
Timeline
- Published
- Last modified