CVE-2026-13325: Virt-handler-rhel9: kubevirt: kubevirt: disabletls migration setting removes authentication, exposing unauthenticated virtqemud proxy on all interfaces

highCVSS 8.5CVE-2026-13325

CSIRTS triage

vendor: KubeVirt product: virt-handler Authentication bypass

What: The disabletls migration setting removes authentication, exposing an unauthenticated virtqemud proxy.
Who is affected: Deployments using KubeVirt with the virt-handler component.
Urgency: Remediation is high urgency due to the high severity rating and potential for unauthorized access.
Action: Reconfigure the migration settings to ensure TLS is enabled.

AI-assisted analysis generated from the source advisory — verify against the original.

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Details

Source: Microsoft Security Response Center (INTL · vendor-psirt · site)
Severity: high — CVSS 8.5
Published: 2026-06-09
Exploitation: Not in CISA KEV at last sync

Original advisory: https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-13325

Exploitation outlook

EPSS (FIRST.org) estimates each CVE’s probability of exploitation in the next 30 days — here is the CSIRTS.com read on those numbers.

Low exploitation riskCVE-2026-133250.18% 30-day exploitation probability — currently an unlikely target, but scores change as exploit code circulates. Riskier than 7% of all scored CVEs.

Referenced CVEs

CVE	CSIRTS overview	External
CVE-2026-13325	coverage & exploitation status	NVD · CVE.org

Same CVEs, other sources

How other CERTs, PSIRTs and databases cover the vulnerabilities in this advisory.

highCVE-2026-13325: A flaw was found in KubeVirt's migration proxy. When spec.configuration.migrations.disableTLS …nvd

Recent advisories for Virt-handler-rhel9

A cluster of recent advisories against the same product widens the attack surface — attackers routinely chain freshly published CVEs on one product, so review these together.

mediumCVE-2026-13201: Kubevirt: virt-handler-rhel9: kubevirt: safepath symlink following in virt-handler enables not…msrc · 2026-06-09
lowCVE-2026-13322: Kubevirt: virt-handler-rhel9: kubevirt: unbounded virtio-serial readline in virt-handler cause…msrc · 2026-06-09
mediumCVE-2026-13208: Kubevirt: virt-handler-rhel9: kubevirt: virt-handler notify server trusts vmi identity from un…msrc · 2026-06-09