EUVD-2026-93396

An issue was discovered in Django 6.1 before 6.1.2, 6.0 before 6.0.9, and 5.2 before 5.2.18. django.forms.models.BaseModelFormSet.saveexistingobjects used the presence of a primary key on a submitted form's instance as evidence that the instance belonged to the formset's limiting queryset. An...