django-wiki is a wiki system for Django. Installations of django-wiki prior to version 0.10.1 are vulnerable to maliciously crafted article content that can cause severe use of server CPU through a regular expression loop. Version 0.10.1 fixes this issue. As a workaround, close off access to create and edit articles by anonymous users.
https://github.com/django-wiki/django-wiki/security/advisories/GHSA-wj85-w4f4-xh8h
https://github.com/django-wiki/django-wiki/commit/8e280fd6c0bd27ce847c67b2d216c6cbf920f88c