An issue in the urllib.parse component of Python before 3.11.4 allows attackers to bypass blocklisting methods by supplying a URL that starts with blank characters.
https://www.kb.cert.org/vuls/id/127587
https://security.netapp.com/advisory/ntap-20230324-0004/
https://pointernull.com/security/python-url-parse-problem.html
https://lists.debian.org/debian-lts-announce/2023/09/msg00022.html