CVE-2025-11419
High
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.
SeverityHigh
CVSS7.5
Exploit probability—
ProductOrg.keycloak:keycloak-quarkus-dist
PublishedDec 23, 2025
First seenDec 23, 2025
Weakness typeCWE-770Allocation of resources without limits
How to fix
Update
- org.keycloak:keycloak-quarkus-dist26.0.16, 26.2.10, 26.4.1 or later
Affected products
| Product | Affected versions | Fixed in |
|---|---|---|
| org.keycloak:keycloak-quarkus-distMaven | v < 26.0.16, 26.1.0 ≤ v < 26.2.10, 26.3.0 ≤ v < 26.4.1 | 26.0.16, 26.2.10, 26.4.1 |
Check your version
Choose the product and enter the version you run to see whether it falls in the affected range.
In the Intelligence 360 plan
Attack Surface Management
See the assets tied to your domains, the technologies they run and known vulnerabilities in one list.