In Django 2.2 before 2.2.18, 3.0 before 3.0.12, and 3.1 before 3.1.6, the django.utils.archive.extract method (used by "startapp --template" and "startproject --template") allows directory traversal via an archive with absolute paths or relative paths with dot segments.
https://www.djangoproject.com/weblog/2021/feb/01/security-releases/
https://security.netapp.com/advisory/ntap-20210226-0004/