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
24492	Bug in BaseCookie load can result in cookies not being set	Mark Hughes	Tim Graham	"A bug with the Python cookie library means that cookies with square brackets (and all subsequent cookies) are ignored. 

http://bugs.python.org/issue22931

As far as I can tell this effects 2.7.9 and 3.4+

In our case some users had a s_vi cookie which appears to come from Adobe Site Catalyst. As this cookie contains square brackets, the Django sessionid which appeared later in the cookie string was being ignored and the user was unable to login.

Here's a simple test case.

{{{
>>> from django.http.cookie import SimpleCookie
>>> dd = SimpleCookie()
>>> dd.load('a=b; c=[; d=r')
>>> dd.output()
'Set-Cookie: a=b'
}}}

Should we try and code around this in `http/cookie.py` where other standard library issues are handled?

"	Bug	closed	HTTP handling	1.7	Normal	wontfix			Accepted	0	0	0	0	0	0