# documentación de Django - 5.2.8

# 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 (#31253).

- Fixed a regression in Django 3.0 that caused a file response using a temporary file to be closed incorrectly (#31240).

- Fixed a data loss possibility in the `select_for_update()`. When using related fields or parent link fields with Multi-table inheritance in the `of` argument, the corresponding models were not locked (#31246).

- Fixed a regression in Django 3.0 that caused misplacing parameters in logged SQL queries on Oracle (#31271).

- Fixed a regression in Django 3.0.3 that caused misplacing parameters of SQL queries when subtracting `DateField` or `DateTimeField` expressions on MySQL (#31312).

- Fixed a regression in Django 3.0 that didn’t include subqueries spanning multivalued relations in the `GROUP BY` clause (#31150).