CVE-2026-27211 Cloud Hypervisor: Host File Exfiltration via QCOW Backing File Abuse

Cloud Hypervisor is a Virtual Machine Monitor for Cloud workloads. Versions 34.0 through 50.0 arevulnerable to arbitrary host file exfiltration constrained by process privileges when using virtio-block devices backed by raw images. A malicious guest can overwrite its disk header with a crafted...

openstack-nova: Regression VMDK/qcow arbitrary file access

An arbitrary file access flaw was found in Nova. By supplying a RAW format image, a specially crafted QCOW2 image with a backing file path, or a VMDK flat image with a descriptor file path, an authenticated user may convince systems to return a copy of the referenced file’s contents from the...

PT-2015-6790 · Openstack · Openstack Image Service

Name of the Vulnerable Software and Affected Versions: OpenStack Image Service Glance versions 2015.1.x before 2015.1.2 kilo Description: The issue allows remote authenticated users to read arbitrary files via a crafted backing file for a qcow2 image when using the V2 API. Recommendations: For...

openstack-cinder: Host file disclosure through qcow2 backing file

A flaw was found in the OpenStack Block Storage cinder upload-to-image functionality. When processing a malicious qcow2 header, cinder could be tricked into reading an arbitrary file from the cinder host...