An issue was discovered in Django 3.2 before 3.2.23, 4.1 before 4.1.13, and 4.2 before 4.2.7. The NFKC normalization is slow on Windows. As a consequence, django.contrib.auth.forms.UsernameField is subject to a potential DoS (denial of service) attack via certain inputs with a very large number of Unicode characters.
{
"cpe": "cpe:2.3:a:djangoproject:django:*:*:*:*:*:*:*:*",
"extracted_events": [
{
"introduced": "3.2"
},
{
"fixed": "3.2.23"
},
{
"introduced": "4.1"
},
{
"fixed": "4.1.13"
},
{
"introduced": "4.2."
},
{
"fixed": "4.2.7"
}
],
"source": "CPE_FIELD"
}