CVE-2026-13218
Medium
Description
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.
SeverityMedium
CVSS4.2
Exploit probability—
Product
Kubevirt
PublishedJun 26, 2026
First seenJun 26, 2026
Weakness typeCWE-61CWE-61
How to fix
Sources list no fixed version or patch link for this vulnerability.
Affected products
| Product | Affected versions | Fixed in |
|---|---|---|
| kubevirt kubevirt | No range specified | — |
| redhat openshift_virtualization | 4 ≤ v ≤ 4.22.0 | — |
| kubevirt.io/kubevirtGo | v ≤ 1.10.0-rc.0 | — |
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