CVE-2026-13218

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 v3 4.2 MEDIUM

4.2^/10

CVSS v3 : MEDIUM

Vector :

Exploitability : 1.1 / Impact : 2.7

Attack Vector LOCAL

Attack Complexity HIGH

Privileges Required LOW

User Interaction NONE

Confidentiality Impact NONE

Integrity Impact LOW

Availability Impact LOW

Scope CHANGED

References

Link	Resource
https://access.redhat.com/security/cve/CVE-2026-13218	Vendor Advisory Mitigation
https://bugzilla.redhat.com/show_bug.cgi?id=2492654	Issue Tracking Vendor Advisory

Configurations

Configuration 1 (hide)

OR	cpe:2.3:a:kubevirt:kubevirt:-:::::kubernetes::
	cpe:2.3:a:redhat:openshift_virtualization::::::::

History

06 Jul 2026, 17:46

Type	Values Removed	Values Added
References	~~() https://access.redhat.com/security/cve/CVE-2026-13218 -~~	() https://access.redhat.com/security/cve/CVE-2026-13218 - Vendor Advisory, Mitigation
References	~~() https://bugzilla.redhat.com/show_bug.cgi?id=2492654 -~~	() https://bugzilla.redhat.com/show_bug.cgi?id=2492654 - Issue Tracking, Vendor Advisory
First Time		Redhat openshift Virtualization Kubevirt Redhat Kubevirt kubevirt
CPE		cpe:2.3:a:redhat:openshift_virtualization:::::::: cpe:2.3:a:kubevirt:kubevirt:-:::::kubernetes::

26 Jun 2026, 00:16

Type	Values Removed	Values Added
New CVE

Information

Published : 2026-06-26 00:16

Updated : 2026-07-06 17:46

NVD link : CVE-2026-13218

Mitre link : CVE-2026-13218

CVE.ORG link : CVE-2026-13218

JSON object : View

Products Affected

kubevirt

kubevirt

redhat

openshift_virtualization

CWE

CWE-61

UNIX Symbolic Link (Symlink) Following

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