MongoDb Use After Free Vulnerability - CVE-2019-2393
A user authorized to perform database queries may trigger denial of service by issuing specially crafted queries which use lookup and collations. This issue affects MongoDB Server v4.2 versions prior to 4.2.1 MongoDB Server v4.0 versions prior to 4.0.13 and MongoDB Server v3.6 versions prior to 3.6.15.