CVE-2026-13218
Kubevirt: kubevirt: symlink following in writetocachedfile allows host file overwrite from virt-launcher
Vexday Risk Score
10Low
SSVC decision (CISA)
Track
No exploitation signal → monitor
CVSS 4.2EPSS —KEV nãoPoC —Nuclei —Metasploit —Patch —
Lifecycle
25 Jun 2026Published on NVD
Recommendation: Monitor — no exploitation signal at the moment.
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.
CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:C/C:N/I:L/A:L
Affected products
Red Hat · Red Hat OpenShift Virtualization 4Want to know if your infrastructure is exposed to this?
Talk to TrueHacking →