OpenStack Glance before 2015.1.1 (kilo) allows remote authenticated users to cause a denial of service (disk consumption) by repeatedly using the import task flow API to create images and then deleting them.
https://bugs.launchpad.net/glance/+bug/1454087
http://www.securityfocus.com/bid/76068
http://lists.openstack.org/pipermail/openstack-announce/2015-July/000481.html