CVE-2026-13218: Kubevirt

Medium severity, CVSS 4.2. EPSS: 0.1% chance of exploitation in the next 30 days.

A flaw was found in KubeVirt's virt-handler network cache handling. The WriteToCachedFile function writes data to a launcher-rooted path using os.WriteFile and os.Chown without symlink protection. A user with access to the virt-launcher container can plant a symlink at the cache file path, causing virt-handler to follow it and overwrite an arbitrary host file with JSON content and change its ownership.

Affected products

• Kubevirt Kubevirt: affected versions not specified
• Red Hat Openshift Virtualization: from 4, up to and including 4.22.0

Published 2026-06-26. Last modified 2026-07-06.