PT-2026-52631 · Red Hat · Red Hat Openshift Virtualization 4

Huzaifa Sidhpurwala · Published 2026-06-25 · Updated 2026-06-26 · CVE-2026-13218

NVD

CVSS v3.1

4.2

Medium

Base vector

AV:L/AC:H/PR:L/UI:N/S:C/C:N/I:L/A:L

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.

Fix

Weakness Enumeration

CWE-61

Related Identifiers

CVE-2026-13218

Affected Products

Red Hat Openshift Virtualization 4

References · 3

• https://nvd.nist.gov/vuln/detail/CVE-2026-13218 · Security Note
• https://bugzilla.redhat.com/show_bug.cgi?id=2492654 · Note
• https://access.redhat.com/security/cve/CVE-2026-13218 · Note