CVE 2013-4428
OpenStack Image Registry and Delivery Service (Glance) Folsom, Grizzly before 2013.1.4, and Havana before 2013.2, when the download_image policy is configured, does not properly restrict access to cached images, which allows remote authenticated users to read otherwise restricted images via an image UUID.
See the 
CVE page on Mitre.org
for more details.
