---
title: "Django 2.2.21 release notes"
version: 4.2
locale: ja
source: https://docs.djangoproject.com/ja/4.2/releases/2.2.21/
canonical: https://djangodocs.dev/ja/4.2/releases/2.2.21/
---
# Django 2.2.21 release notes

*May 4, 2021*

Django 2.2.21 fixes a security issue in 2.2.20.

## CVE-2021-31542: Potential directory-traversal via uploaded files

`MultiPartParser`, `UploadedFile`, and `FieldFile` allowed
directory-traversal via uploaded files with suitably crafted file names.

In order to mitigate this risk, stricter basename and path sanitation is now
applied.