The import task action in OpenStack Image Service (Glance) 2015.1.x before 2015.1.2 (kilo), when using the V2 API, allows remote authenticated users to read arbitrary files via a crafted backing file for a qcow2 image.
"https://github.com/pypa/advisory-database/blob/main/vulns/glance/PYSEC-2015-39.yaml"