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CVE-2026-13318

6.4 medium SSVC exploitation: none Analyzed
NVD · CVE.org

A server-side request forgery (SSRF) flaw was found in KubeVirt's virt-api port-forward handler. When processing a port-forward request to a VirtualMachineInstance (VMI), virt-api reads the target IP from vmi.Status.Interfaces[0].IP and passes it directly to net.Dial() without validation. For VMIs using non-masquerade network bindings (bridge or secondary-only), this IP is reported by the QEMU guest agent running inside the VM and is fully controllable by the VM owner. An attacker with kubevirt.io:edit permissions can create a VM with a modified guest agent that reports an arbitrary IP address, then request port-forward to establish a bidirectional TCP tunnel from virt-api's cluster-internal network position to any routable destination, bypassing NetworkPolicy isolation.

Fix

Patch, vendor advisory and mitigation references on NVD 2

Every line above is quoted from NVD, CISA, Microsoft, the vendor's own advisory or DISA; nothing is generated.

Change history 1

  1. First seenCVSS 6.4 · kubevirt, redhatNVD modified 2026-10-25 22:10

Affected (CPE criteria) 2

  • cpe:2.3:a:kubevirt:kubevirt:-:*:*:*:*:kubernetes:*:*
  • cpe:2.3:a:redhat:openshift_virtualization:*:*:*:*:*:*:*:*

References 2