The host is installed with Node.js 4.x before 4.9.0, 6.x before 6.14.0, 8.x before 8.11.0, or 9.x before 9.10.0 and is prone to an improper input validation vulnerability. A flaw is present in the application which fails to handle an issue in the HTTP parser. Successful exploitation allows an attacker to ignore spaces in the `Content-Length` header, allowing input such as 'Content-Length: 1 2' to be interpreted as having a value of '12'.