How to fix 'XML Injection' security vulnerability issue in apex.

RestRequest req= RestContext.request; 

String XmlData= req.requestBody.toString(); 

if(!String.isBlank(XmlData)){ 

initmapping(); 

Dom.Document docx=new Dom.Document(); 

docx.load(XmlData); 

  getting Vulnerability issue on Snyk tool for this line  docx.load(XmlData);  

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