Threats Tagged 'cve-2026-17527'

CVE-2026-17527 is a high-severity vulnerability in Red Hat OpenShift Virtualization's containerized-data-importer (CDI) component. The aggregated cdi.kubevirt.io:view ClusterRole, which is intended to provide read-only access, incorrectly grants create permission on the datavolumes/source subresource. This flaw allows a user or service account with view role cluster-wide and write access to any namespace to clone and exfiltrate the contents of any PersistentVolumeClaim (PVC) across namespaces, bypassing namespace isolation. The vulnerability affects default aggregated RBAC roles in CDI and downstream consumers including OpenShift Virtualization. No fix is currently available, and mitigation involves avoiding cluster-wide binding of the vulnerable role and auditing role bindings to prevent combined view and write access across namespaces.

In containerized-data-importer (CDI), the aggregated cdi.kubevirt.io:view ClusterRole, intended to provide read-only access to CDI resources, includes a rule granting create on the datavolumes/source subresource. CDI's DataVolume clone authorization accepts this permission as sufficient to authorize cloning the contents of any PVC the caller can name, without requiring write access to the source namespace. A user or service account bound to the view role, commonly granted cluster-wide via ClusterRoleBinding, who also has ordinary write access (edit/admin) to any single namespace, can use this to exfiltrate the contents of any PVC in the cluster into a namespace they control, bypassing namespace isolation and the read-only guarantee of the view role.