PYSEC-2026-859 OpenStack Compute Nova Improper Access Control

The XenAPI backend in OpenStack Compute Nova Folsom, Grizzly, and Havana before 2013.2 does not properly apply security groups 1 when resizing an image or 2 during live migration, which allows remote attackers to bypass intended restrictions...

Nova: insecure directory permissions in snapshots

OpenStack Compute Nova Grizzly 2013.1.4, Havana 2013.2.1, and earlier uses world-writable and world-readable permissions for the temporary directory used to store live snapshots, which allows local users to read and modify live snapshots...