{"id":"GHSA-q3jc-42cq-33fj","revision":"417b31aa59424c95ad9a567aed2d0e7a","records":[{"revision":"417b31aa59424c95ad9a567aed2d0e7a","observedAt":"2026-11-05T23:38:32.248+00:00","statement":{"source":"osv","id":"GHSA-q3jc-42cq-33fj","aliases":["CVE-2026-13218","GO-2026-6914"],"title":"KubeVirt virt-handler network cache symlink vulnerability allows arbitrary host file overwrite","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.","state":0,"publishedAt":"2026-06-26T00:32:07+00:00","modifiedAt":"2026-11-05T23:25:35.9919388+00:00","affected":[{"ecosystem":"Go","name":"kubevirt.io/kubevirt","ranges":[{"type":"SEMVER","events":[{"kind":"introduced","version":"0"},{"kind":"last_affected","version":"1.10.0-rc.0"}]}],"versions":[],"rawVersionEvidence":null}],"metrics":[{"system":"CVSS_V3","vector":"CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:C/C:N/I:L/A:L","score":null,"severity":null},{"system":"Publisher rating","vector":null,"score":null,"severity":"MODERATE"}],"references":["https://nvd.nist.gov/vuln/detail/CVE-2026-13218","https://access.redhat.com/security/cve/CVE-2026-13218","https://bugzilla.redhat.com/show_bug.cgi?id=2492654","https://github.com/kubevirt/kubevirt","https://github.com/kubevirt/kubevirt/blob/e63503d2f3a166f79f0891f8e1c3450eb39f88ac/pkg/network/cache/cache.go#L90-L103"],"sourceUrl":"https://github.com/advisories/GHSA-q3jc-42cq-33fj","license":"GitHub Advisory Database · CC-BY-4.0","key":"osv:GHSA-q3jc-42cq-33fj","identifiers":["GHSA-q3jc-42cq-33fj","CVE-2026-13218","GO-2026-6914"]},"retained":false,"historicalAffected":[]}],"coverage":[]}