VULNERABILITY INTELLIGENCE

CVE-2026-13218

CVSS score4.2 MEDIUM
EPSS probability0.14%
CISA KEVNot currently listed
Published2026-06-26
Last modified2026-10-25
CVSS vectorCVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:C/C:N/I:L/A:L

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.

Weakness classification

  • CWE-61: UNIX Symbolic Link (Symlink) Following

Primary references