Django 3.0.1 release notes

December 18, 2019

Django 3.0.1 fixes a security issue and several bugs in 3.0.

CVE-2019-19844: Potential account hijack via password reset form

By submitting a suitably crafted email address making use of Unicode characters, that compared equal to an existing user email when lower-cased for comparison, an attacker could be sent a password reset token for the matched account.

In order to avoid this vulnerability, password reset requests now compare the submitted email using the stricter, recommended algorithm for case-insensitive comparison of two identifiers from Unicode Technical Report 36, section 2.11.2(B)(2). Upon a match, the email containing the reset token will be sent to the email address on record rather than the submitted address.

Bugfixes

  • Fixed a regression in Django 3.0 by restoring the ability to use Django inside Jupyter and other environments that force an async context, by adding an option to disable Async-safety mechanism with DJANGO_ALLOW_ASYNC_UNSAFE environment variable (#31056).
  • Fixed a regression in Django 3.0 where RegexPattern, used by re_path(), returned positional arguments to be passed to the view when all optional named groups were missing (#31061).
  • Reallowed, following a regression in Django 3.0, Window expressions to be used in conditions outside of queryset filters, e.g. in When conditions (#31060).
  • Fixed a data loss possibility in SplitArrayField. When using with ArrayField(BooleanField()), all values after the first True value were marked as checked instead of preserving passed values (#31073).
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