CVE-2015-5143
The session backends in Django before 1.4.21, 1.5.x through 1.6.x, 1.7.x before 1.7.9, and 1.8.x before 1.8.3 allows remote attackers to cause a denial of service (session store consumption) via multiple requests with unique session keys.
Date published : 2015-07-14
http://www.securityfocus.com/bid/75666
http://www.oracle.com/technetwork/topics/security/bulletinoct2015-2511968.html