The host is installed with Node.js 11.x before 11.3.0, 10.x before 10.14.0, 8.x before 8.14.0, or 6.x before 6.15.0 and is prone to a denial of service vulnerability. A flaw is present in the application which fails to handle headers sent very slowly keeping http or https connections and associated resources alive for a long period of time. Successful exploitation allows an attacker to cause a denial of service.