---
title: "Django 3.1.9 リリースノート"
version: 5.2
locale: ja
source: https://docs.djangoproject.com/ja/5.2/releases/3.1.9/
canonical: https://djangodocs.dev/ja/5.2/releases/3.1.9/
---
# Django 3.1.9 リリースノート

*May 4, 2021*

Django 3.1.9 fixes a security issue in 3.1.8.

## 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.