Ignored CVE-2019-8341 for jinja2.

[yfukai]

In Jinja2, the from_string function is prone to Server Side Template Injection (SSTI) where it takes the "source" parameter as a template object, renders it, and then returns it. The attacker can exploit it with {{INJECTION COMMANDS}} in a URI.
NOTE: The maintainer and multiple third parties believe that this vulnerability isn't valid because users shouldn't use untrusted templates without sandboxing.

We are not using untrusted template and I believe we can safely ignore this.