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Date: Mon, 1 Jul 2019 09:57:33 +0200
From: Mariusz Felisiak <>
Subject: Django: CVE-2019-12781: Incorrect HTTP detection with reverse-proxy
 connecting via HTTPS

In accordance with `our security release policy 
<>`_, the 
Django team is issuing `Django 1.11.22 
<>`_, `Django 
2.1.10 <>`_, and 
`Django 2.2.3 <>`_. 
These releases addresses the security issues detailed below. We 
encourage all users of Django to upgrade as soon as possible.

Thanks Gavin Wahl for reporting this issue.

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

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 

``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 
correctly handles code paths relying on ``scheme``, ``is_secure()``, 
``build_absolute_uri()``, and ``SECURE_SSL_REDIRECT``.

Affected supported versions

* Django master development branch
* Django 2.2 before version 2.2.3
* Django 2.1 before version 2.1.10
* Django 1.11 before version 1.11.22


Patches to resolve the issue have been applied to Django's master branch 
and the 2.2, 2.1, and 1.11 release branches. The patches may be obtained 
from the following changesets:

* On the `master branch 
* On the `2.2 release branch 
* On the `2.1 release branch 
* On the `1.11 release branch 

The following releases have been issued:

* Django 1.11.22 (`download Django 1.11.22 
| `1.11.22 checksums 
* Django 2.1.10 (`download Django 2.1.10 
<>`_ | 
`2.1.10 checksums 
* Django 2.2.3 (`download Django 2.2.3 
<>`_ | 
`2.2.3 checksums 

The PGP key ID used for this release is Mariusz Felisiak: 2EF56372BA48CD1B.

General notes regarding security reporting

As always, we ask that potential security issues be reported via
private email to ````, and not via Django's
Trac instance, Django's GitHub repositories, or the django-developers list.
Please see `our security policies 
for further information.

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