django1/docs/releases/3.0.1.txt

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==========================
Django 3.0.1 release notes
==========================
*December 18, 2019*
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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.
.. __: https://www.unicode.org/reports/tr36/#Recommendations_General
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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
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an option to disable :ref:`async-safety` mechanism with
``DJANGO_ALLOW_ASYNC_UNSAFE`` environment variable (:ticket:`31056`).
* Fixed a regression in Django 3.0 where ``RegexPattern``, used by
:func:`~django.urls.re_path`, returned positional arguments to be passed to
the view when all optional named groups were missing (:ticket:`31061`).
* Reallowed, following a regression in Django 3.0,
:class:`~django.db.models.expressions.Window` expressions to be used in
conditions outside of queryset filters, e.g. in
:class:`~django.db.models.expressions.When` conditions (:ticket:`31060`).
* Fixed a data loss possibility in
:class:`~django.contrib.postgres.forms.SplitArrayField`. When using with
``ArrayField(BooleanField())``, all values after the first ``True`` value
were marked as checked instead of preserving passed values (:ticket:`31073`).