# Django 5.0.9.dev20240806133106 ドキュメント

# Django 2.2.21 リリースノート

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.