Hi,
Thanks for this excellent tool!
We use it for various things in a quantum chemistry tool-chain, but have recently received a warning from github's dependabot scanning about one of the packages upstream from you: underscore.js has a security announcement ( CVE-2021-23358 ) for arbitrary code execution. Unfortunately this is fixed in underscore 1.12.1, but Sphinx-4.0.1 is still on 1.12.0.
Regards
Ben