id	summary	reporter	owner	description	type	status	component	version	severity	resolution	keywords	cc	stage	has_patch	needs_docs	needs_tests	needs_better_patch	easy	ui_ux
29802	Allow skipping CSRF check for Referer header	Aaron Hill	nobody	"Currently, Django's CSRF middleware will reject any 'non-safe' HTTPS request that lacks a Referer header: https://github.com/django/django/blob/22e8ab02863819093832de9f771bf40a62a6bd4a/django/middleware/csrf.py#L242

However, some users may prevent their browsers from sending the Referer header, due to privacy concerns. These users are unable to submit 'non-safe' requests (e.g. POST requests) on HTTPS-enabled Django-powered website that use CSRF protection.

For some websites, checking the Referer header may provide no added security benefit. For example, an HSTS-preloaded website which controls all of its subdomains has nothing to gain from this check - there are no untrusted subdomains which can mount an attack, and HSTS prevents an HTTP MITM attack.

To allow these websites to provide more flexibility to their users, Django should support disabling this CSRF Referer check. This could be done through a new setting, e.g. ' CSRF_REFERER_CHECK' (defaulting to 'True' to avoid breaking existing sites).

"	New feature	closed	CSRF	2.1	Normal	wontfix	csrf,https,hsts,referer		Unreviewed	0	0	0	0	0	0