~ / search / GHSA-q3jc-42cq-33fj

GHSA-q3jc-42cq-33fj

KubeVirt virt-handler network cache symlink vulnerability allows arbitrary host file overwrite

Source: GitHub Advisory Database (reviewed) Moderate CVE-2026-13218

Packages

EcosystemPackageAffectedFixed in
Go kubevirt.io/kubevirt <= 1.10.0-rc.0 no fix listed

Details

As written in the advisory (Markdown source, shown as plain text).

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.

References

External links from the advisory. They lead to third-party sites.