Medium severity4.2NVD Advisory· Published Jun 26, 2026· Updated Jul 6, 2026
CVE-2026-13218
CVE-2026-13218
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.
Affected products
3- cpe:2.3:a:redhat:openshift_virtualization:*:*:*:*:*:*:*:*Range: >=4,<=4.22.0
Patches
Vulnerability mechanics
References
2- access.redhat.com/security/cve/CVE-2026-13218nvdVendor AdvisoryMitigation
- bugzilla.redhat.com/show_bug.cginvdIssue TrackingVendor Advisory
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