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CVE-2026-13318

Status: AnalyzedMedium (6.4)—

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.

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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.

CVSS

Exploitation probability (EPSS)

EPSS (Exploit Prediction Scoring System, FIRST) estimates how likely a vulnerability is to be exploited in the wild within 30 days. It complements CVSS (impact) and CISA KEV (confirmed exploitation).

Affected technologies (2)

Kubevirt — KubevirtRedhat — Openshift Virtualization

CWEs

References

Raw JSON (NVD)

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{
  "id": "CVE-2026-13318",
  "cveTags": [],
  "metrics": {
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          "role": "CISA Coordinator",
          "options": [
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          "version": "2.0.3",
          "timestamp": "2026-06-26T12:35:22.451050Z"
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          "vectorString": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:L/I:L/A:N",
          "integrityImpact": "LOW",
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  "published": "2026-06-26T00:16:51.277",
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      "source": "secalert@redhat.com"
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  "vulnStatus": "Analyzed",
  "weaknesses": [
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      "source": "secalert@redhat.com",
      "description": [
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          "lang": "en",
          "value": "CWE-918"
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  "descriptions": [
    {
      "lang": "en",
      "value": "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."
    }
  ],
  "lastModified": "2026-07-06T17:45:33.717",
  "configurations": [
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            },
            {
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              "vulnerable": true,
              "matchCriteriaId": "5301905C-9B5C-479F-A69A-659C6CB3AA42",
              "versionEndIncluding": "4.22.0",
              "versionStartIncluding": "4"
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          "operator": "OR"
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  "sourceIdentifier": "secalert@redhat.com"
}