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==========================
Django 3.0.4 release notes
==========================
*March 4, 2020*
Django 3.0.4 fixes a security issue and several bugs in 3.0.3.
CVE-2020-9402: Potential SQL injection via ``tolerance`` parameter in GIS functions and aggregates on Oracle
============================================================================================================
GIS functions and aggregates on Oracle were subject to SQL injection,
using a suitably crafted ``tolerance``.
Bugfixes
========
* Fixed a data loss possibility when using caching from async code
(:ticket:`31253`).
* Fixed a regression in Django 3.0 that caused a file response using a
temporary file to be closed incorrectly (:ticket:`31240`).
* Fixed a data loss possibility in the
:meth:`~django.db.models.query.QuerySet.select_for_update`. When using
related fields or parent link fields with :ref:`multi-table-inheritance` in
the ``of`` argument, the corresponding models were not locked
(:ticket:`31246`).
* Fixed a regression in Django 3.0 that caused misplacing parameters in logged
SQL queries on Oracle (:ticket:`31271`).
* Fixed a regression in Django 3.0.3 that caused misplacing parameters of SQL
queries when subtracting ``DateField`` or ``DateTimeField`` expressions on
MySQL (:ticket:`31312`).
* Fixed a regression in Django 3.0 that didn't include subqueries spanning
multivalued relations in the ``GROUP BY`` clause (:ticket:`31150`).
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