An Azure NoSQL database service for app development.
This is a question for that team. You can get to their support section here.
In the interim you can take an explicit dependency on Newtonsoft and update it to a non-vulnerable version. This is how you work around these kinds of issues until package developers update their code. In Visual Studio you can do this easily by going to the project that is impacted, select the installed packages and then the option to show vulnerabilities. Transient dependencies are listed as well so you can select the vulnerable dependency and update it to a newer version. This resolves the issue but does add an explicit dependency that you'll need to remove at some point in the future.