# Django 5.2.7 documentation

# Django 5.0.8 release notes

August 6, 2024

Django 5.0.8 fixes three security issues with severity “moderate”, one security issue with severity “high”, and several bugs in 5.0.7.

## CVE-2024-41989: Memory exhaustion in `django.utils.numberformat.floatformat()`

If `floatformat` received a string representation of a number in scientific notation with a large exponent, it could lead to significant memory consumption.

To avoid this, decimals with more than 200 digits are now returned as is.

## CVE-2024-41990: Potential denial-of-service vulnerability in `django.utils.html.urlize()`

`urlize` and `urlizetrunc` were subject to a potential denial-of-service attack via very large inputs with a specific sequence of characters.

## CVE-2024-41991: Potential denial-of-service vulnerability in `django.utils.html.urlize()` and `AdminURLFieldWidget`

`urlize`, `urlizetrunc`, and `AdminURLFieldWidget` were subject to a potential denial-of-service attack via certain inputs with a very large number of Unicode characters.

## CVE-2024-42005: Potential SQL injection in `QuerySet.values()` and `values_list()`

`QuerySet.values()` and `values_list()` methods on models with a `JSONField` were subject to SQL injection in column aliases, via a crafted JSON object key as a passed `*arg`.

## Bugfixes

- Added missing validation for `UniqueConstraint(nulls_distinct=False)` when using `*expressions` (#35594).

- Fixed a regression in Django 5.0 where `ModelAdmin.action_checkbox` could break the admin changelist HTML page when rendering a model instance with a `__html__` method (#35606).

- Fixed a crash when creating a model with a `Field.db_default` and a `Meta.constraints` constraint composed of `__endswith`, `__startswith`, or `__contains` lookups (#35625).

- Fixed a regression in Django 5.0.7 that caused a crash in `LocaleMiddleware` when processing a language code over 500 characters (#35627).

- Fixed a bug in Django 5.0 that caused a system check crash when `ModelAdmin.date_hierarchy` was a `GeneratedField` with an `output_field` of `DateField` or `DateTimeField` (#35628).

- Fixed a bug in Django 5.0 which caused constraint validation to either crash or incorrectly raise validation errors for constraints referring to fields using `Field.db_default` (#35638).

- Fixed a crash in Django 5.0 when saving a model containing a `FileField` with a `db_default` set (#35657).