Deserialization of Untrusted Data
Under very specific circumstances (see Required configuration section below), a privileged user is able to cause arbitrary code to be executed which may cause further disruption to services. This is specific to applications written in C#. This affects all MongoDB .NET/C# Driver versions prior to and including v2.18.0
All versions before 2.19.0
Upgrade to version 2.19.0 or above.