November 1, 2023
Django 4.1.13 fixes a security issue with severity "moderate" in 4.1.12.
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.
Jan 15, 2024