CVE-2026-13208: Kubevirt: virt-handler-rhel9: kubevirt: virt-handler notify server trusts vmi identity from unauthenticated grpc request body

mediumCVSS 6.5CVE-2026-13208

CSIRTS triage

vendor: Kubevirt product: Kubevirt Authentication bypassaffected: virt-handler-rhel9

What: The virt-handler notify server trusts VMI identity from unauthenticated gRPC request body.
Who is affected: Deployments using Kubevirt virt-handler on RHEL 9.
Urgency: Remediation is medium urgency due to the medium severity of the issue.
Action: Apply updates to mitigate CVE-2026-13208.

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

⚡ Watch Kubevirt

Get an email when a new Kubevirt advisory drops — max one per day, one-click unsubscribe.

Details

Source: Microsoft Security Response Center (INTL · vendor-psirt · site)
Severity: medium — CVSS 6.5
Published: 2026-06-09
Exploitation: Not in CISA KEV at last sync

Original advisory: https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-13208

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-2026-132080.09% 30-day exploitation probability — currently an unlikely target, but scores change as exploit code circulates. Riskier than 1% of all scored CVEs.

Referenced CVEs

CVE	CSIRTS overview	External
CVE-2026-13208	coverage & exploitation status	NVD · CVE.org

Recent advisories for Kubevirt

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-2026-13434: A flaw was found in KubeVirt's network annotation generator. When a tenant creates a VirtualMa…nvd · 2026-06-26
highCVE-2026-13325: A flaw was found in KubeVirt's migration proxy. When spec.configuration.migrations.disableTLS …nvd · 2026-06-26
lowCVE-2026-13322: A flaw was found in KubeVirt's downward metrics virtio-serial server. The server reads guest r…nvd · 2026-06-26
mediumCVE-2026-13318: A server-side request forgery (SSRF) flaw was found in KubeVirt's virt-api port-forward handle…nvd · 2026-06-26
mediumCVE-2026-13218: A flaw was found in KubeVirt's virt-handler network cache handling. The WriteToCachedFile func…nvd · 2026-06-26
mediumCVE-2026-13318: Virt-api-rhel9: kubevirt: kubevirt: ssrf in virt-api port-forward via unvalidated guest-agent-…msrc · 2026-06-09