Flask Caching Security Issue

**Bug Description**
We have a flag for a potential security involving flask-caching. There was some recent activity in this packages repo that might result in this being resolved soon. Flagging this in issues until this resolves it self or we find an alternative.

[https://github.com/pallets-eco/flask-caching/pull/209](https://github.com/pallets-eco/flask-caching/pull/209)
