CVE-2026-13218Published

Kubevirt: kubevirt: symlink following in writetocachedfile allows host file overwrite from virt-launcher

Exact source revision recorded 23 Oct 2026 15:48:27 UTC. It does not establish the source's current position. Latest evidence.

Recorded JSON

cve-program · CVE-2026-13218

Published

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.

Source published: 25 Jun 2026 23:23:23 UTC
Source modified: 26 Jun 2026 14:58:48 UTC
Observed here: 23 Oct 2026 15:48:27 UTC
Source terms: CVE Program Terms of Use

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CVSS 3.1 · 4.2 CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:C/C:N/I:L/A:L