PYSEC-2026-875 OpenStack Compute (Nova) vulnerable to denial of service via XML Entity Expansion attack

The security group extension in OpenStack Compute Nova Grizzly 2013.1.3, Havana before havana-3, and earlier allows remote attackers to cause a denial of service resource consumption and crash via an XML Entity Expansion XEE attack. NOTE: this issue is due to an incomplete fix for CVE-2013-1664...