The glance-manage db in all versions of HPE Helion Openstack Glance allows deleted image ids to be reassigned, which allows remote authenticated users to cause other users to boot into a modified image without notification of the change.
https://wiki.openstack.org/wiki/OSSN/OSSN-0075
https://h20566.www2.hpe.com/portal/site/hpsc/public/kb/docDisplay?docId=emr_na-c05273584