Django 3.2.23 release notes

November 1, 2023

Django 3.2.23 fixes a security issue with severity “moderate” in 3.2.22.

CVE-2023-46695: Potential denial of service vulnerability in UsernameField on Windows

The NFKC normalization is slow on Windows. As a consequence, django.contrib.auth.forms.UsernameField was subject to a potential denial of service attack via certain inputs with a very large number of Unicode characters.

In order to avoid the vulnerability, invalid values longer than UsernameField.max_length are no longer normalized, since they cannot pass validation anyway.