# Documentation Django 3.1.9.dev

# Notes de publication de Django 1.11.22

July 1, 2019

Django 1.11.22 fixes a security issue in 1.11.21.

## CVE-2019-12781: Incorrect HTTP detection with reverse-proxy connecting via HTTPS

When deployed behind a reverse-proxy connecting to Django via HTTPS, `django.http.HttpRequest.scheme` would incorrectly detect client requests made via HTTP as using HTTPS. This entails incorrect results for `is_secure()`, and `build_absolute_uri()`, and that HTTP requests would not be redirected to HTTPS in accordance with `SECURE_SSL_REDIRECT`.

`HttpRequest.scheme` now respects `SECURE_PROXY_SSL_HEADER`, if it is configured, and the appropriate header is set on the request, for both HTTP and HTTPS requests.

If you deploy Django behind a reverse-proxy that forwards HTTP requests, and that connects to Django via HTTPS, be sure to verify that your application correctly handles code paths relying on `scheme`, `is_secure()`, `build_absolute_uri()`, and `SECURE_SSL_REDIRECT`.