Google Re-captcha Response is flagged as flaw CWE 918, in Veracode

Question

I am Sitecore developer and in our website we have a form carrying Re-Captcha. When we are validating our solution in Veracode, at GetResponse the CWE 918 flaw is raised. Adding the code below.

public bool IsReCaptchValid()  
{  
    var result = false;  
    var captchaResponse = Request.Form["g-recaptcha-response"];  
    var secretKey = ConfigurationManager.AppSettings["SecretKey"];  
    var apiUrl = "https://www.google.com/recaptcha/api/siteverify?secret={0}&response={1}";  
    var requestUri = string.Format(apiUrl, secretKey, captchaResponse);  
    var request = (HttpWebRequest)WebRequest.Create(requestUri);  
  
    using(WebResponse response = request.GetResponse())  
    {  
        using (StreamReader stream = new StreamReader(response.GetResponseStream()))  
        {  
            JObject jResponse = JObject.Parse(stream.ReadToEnd());  
            var isSuccess = jResponse.Value<bool>("success");  
            result = (isSuccess) ? true : false;  
        }  
    }  
    return result;  
} 

The flaw is thrown in the first line of the code, "request.GetResponse()". How to validate the Response? Thanks in advance.