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 con…
Exact source revision recorded 4 Nov 2026 18:06:24 UTC. It does not establish the source's current position. Latest evidence.
euvd · EUVD-2026-39594
PublishedA 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.
EUVD source date text has no stated timezone and is retained without inventing a UTC instant. Related bulletin membership is not an alias, common cause or applicability claim. A missing vector with a zero score is treated as unrated. Complete vendor/product and underlying source evidence remains in the original JSON.
Original publisher date fields
datePublished: Jun 25, 2026, 11:23:23 PM
dateUpdated: Jun 26, 2026, 2:58:48 PM
1 related source bulletins · separate from aliases
msrc_CVE-2026-13218: Kubevirt: kubevirt: symlink following in writetocachedfile allows host file overwrite from virt-launcher
CVE-2026-13218
- Source published
- Jun 25, 2026, 11:23:23 PM (timezone not stated)
- Source modified
- Jun 26, 2026, 2:58:48 PM (timezone not stated)
- Observed here
- 4 Nov 2026 18:06:24 UTC
- Source terms
- ENISA EUVD · source terms and attribution apply
Original source record · Cite this exact observation · Complete original publisher JSON
This view projects the publisher's source fields for reading; the original JSON retains additional fields and CVE enrichment containers. Attribution: euvd · ENISA EUVD · source terms and attribution apply. Source text is retained; field grouping and change labels are provided by ChangeIntel.
EUVD CVSS 3.1 · 4.2 CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:C/C:N/I:L/A:L