Django

==========================

*September 1, 2021*

Django 3.2.7 fixes a bug in 3.2.6.

Bugfixes
========

* Fixed a regression in Django 3.2 that caused the incorrect offset extraction
from fixed offset timezones (:ticket:`32992`).


==========================

==========================

*August 2, 2021*

Django 3.2.6 fixes several bugs in 3.2.5.

Bugfixes
========

* Fixed a regression in Django 3.2 that caused a crash validating ``"NaN"``
input with a ``forms.DecimalField`` when additional constraints, e.g.
``max_value``, were specified (:ticket:`32949`).

* Fixed a bug in Django 3.2 where a system check would crash on a model with a
reverse many-to-many relation inherited from a parent class
(:ticket:`32947`).


==========================

==========================

*July 1, 2021*

Django 3.2.5 fixes a security issue with severity "high" and several bugs in
3.2.4. Also, the latest string translations from Transifex are incorporated.

CVE-2021-35042: Potential SQL injection via unsanitized ``QuerySet.order_by()`` input
=====================================================================================

Unsanitized user input passed to ``QuerySet.order_by()`` could bypass intended
column reference validation in path marked for deprecation resulting in a
potential SQL injection even if a deprecation warning is emitted.

As a mitigation the strict column reference validation was restored for the
duration of the deprecation period. This regression appeared in 3.1 as a side
effect of fixing :ticket:`31426`.

The issue is not present in the main branch as the deprecated path has been
removed.

Bugfixes
========

* Fixed a regression in Django 3.2 that caused a crash of
``QuerySet.values_list(…, named=True)`` after ``prefetch_related()``
(:ticket:`32812`).

* Fixed a bug in Django 3.2 that caused a migration crash on MySQL 8.0.13+ when
altering ``BinaryField``, ``JSONField``, or ``TextField`` to non-nullable
(:ticket:`32503`).

* Fixed a regression in Django 3.2 that caused a migration crash on MySQL
8.0.13+ when adding nullable ``BinaryField``, ``JSONField``, or ``TextField``
with a default value (:ticket:`32832`).

* Fixed a bug in Django 3.2 where a system check would crash on a model with an
invalid ``app_label`` (:ticket:`32863`).


==========================

==========================

*June 2, 2021*

Django 3.2.4 fixes two security issues and several bugs in 3.2.3.

CVE-2021-33203: Potential directory traversal via ``admindocs``
===============================================================

Staff members could use the :mod:`~django.contrib.admindocs`
``TemplateDetailView`` view to check the existence of arbitrary files.
Additionally, if (and only if) the default admindocs templates have been
customized by the developers to also expose the file contents, then not only
the existence but also the file contents would have been exposed.

As a mitigation, path sanitation is now applied and only files within the
template root directories can be loaded.

CVE-2021-33571: Possible indeterminate SSRF, RFI, and LFI attacks since validators accepted leading zeros in IPv4 addresses
===========================================================================================================================

:class:`~django.core.validators.URLValidator`,
:func:`~django.core.validators.validate_ipv4_address`, and
:func:`~django.core.validators.validate_ipv46_address` didn't prohibit leading
zeros in octal literals. If you used such values you could suffer from
indeterminate SSRF, RFI, and LFI attacks.

:func:`~django.core.validators.validate_ipv4_address` and
:func:`~django.core.validators.validate_ipv46_address` validators were not
affected on Python 3.9.5+.

Bugfixes
========

* Fixed a bug in Django 3.2 where a final catch-all view in the admin didn't
respect the server-provided value of ``SCRIPT_NAME`` when redirecting
unauthenticated users to the login page (:ticket:`32754`).

* Fixed a bug in Django 3.2 where a system check would crash on an abstract
model (:ticket:`32733`).

* Prevented unnecessary initialization of unused caches following a regression
in Django 3.2 (:ticket:`32747`).

* Fixed a crash in Django 3.2 that could occur when running ``mod_wsgi`` with
the recommended settings while the Windows ``colorama`` library was installed
(:ticket:`32740`).

* Fixed a bug in Django 3.2 that would trigger the auto-reloader for template
changes when directory paths were specified with strings (:ticket:`32744`).

* Fixed a regression in Django 3.2 that caused a crash of auto-reloader with
``AttributeError``, e.g. inside a ``Conda`` environment (:ticket:`32783`).

* Fixed a regression in Django 3.2 that caused a loss of precision for
operations with ``DecimalField`` on MySQL (:ticket:`32793`).


==========================

==========================

*May 13, 2021*

Django 3.2.3 fixes several bugs in 3.2.2.

Bugfixes
========

* Prepared for ``mysqlclient`` > 2.0.3 support (:ticket:`32732`).

* Fixed a regression in Django 3.2 that caused the incorrect filtering of
querysets combined with the ``|`` operator (:ticket:`32717`).

* Fixed a regression in Django 3.2.1 where saving ``FileField`` would raise a
``SuspiciousFileOperation`` even when a custom
:attr:`~django.db.models.FileField.upload_to` returns a valid file path
(:ticket:`32718`).


==========================

==========================

*May 6, 2021*

Django 3.2.2 fixes a security issue and a bug in 3.2.1.

CVE-2021-32052: Header injection possibility since ``URLValidator`` accepted newlines in input on Python 3.9.5+
===============================================================================================================

On Python 3.9.5+, :class:`~django.core.validators.URLValidator` didn't prohibit
newlines and tabs. If you used values with newlines in HTTP response, you could
suffer from header injection attacks. Django itself wasn't vulnerable because
:class:`~django.http.HttpResponse` prohibits newlines in HTTP headers.

Moreover, the ``URLField`` form field which uses ``URLValidator`` silently
removes newlines and tabs on Python 3.9.5+, so the possibility of newlines
entering your data only existed if you are using this validator outside of the
form fields.

This issue was introduced by the :bpo:`43882` fix.

Bugfixes
========

* Prevented, following a regression in Django 3.2.1, :djadmin:`makemigrations`
from generating infinite migrations for a model with ``Meta.ordering``
contained ``OrderBy`` expressions (:ticket:`32714`).


==========================