Django - 4.1.9


Django 4.1.9 release notes

May 3, 2023

Django 4.1.9 fixes a security issue with severity “low” in 4.1.8.

CVE-2023-31047: Potential bypass of validation when uploading multiple files using one form field

Uploading multiple files using one form field has never been supported by
forms.FileField or forms.ImageField as only the last
uploaded file was validated. Unfortunately, Uploading multiple files
topic suggested otherwise.

In order to avoid the vulnerability, ClearableFileInput
and FileInput form widgets now raise ValueError when
the multiple HTML attribute is set on them. To prevent the exception and
keep the old behavior, set allow\_multiple\_selected to True.

For more details on using the new attribute and handling of multiple files
through a single field, see Uploading multiple files.


May 3, 2023, 11:56 a.m.
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