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  4. CVE 2026 13318 virt api rhel9 kubevirt kubevirt ssrf in virt api
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Back to active CVEs
Medium · CVSS 6.4CVE-2026-13318

Virt-api-rhel9: kubevirt: kubevirt: ssrf in virt-api port-forward via unvalidated guest-agent-reported ipCVE-2026-13318

Answer in brief

CVE-2026-13318 records a Medium severity (CVSS 6.4) vulnerability in Virt-api-rhel9: kubevirt: kubevirt: ssrf in virt-api port-forward via unvalidated guest-agent-reported ip. The current sources do not mark it as known exploited. The current feed maps Red Hat/container-native-virtualization/virt-api (generic), Red Hat/container-native-virtualization/virt-api-rhel9 (generic). Check affected ranges and fixed versions before updating.

Analysis pending evidence review

HOL Guard separates source facts from reviewed analysis. See the methodology.

Published Jun 25, 2026Updated Oct 25, 2026Source checked Nov 3, 2026First seen by HOL Jun 26, 2026Material review Oct 25, 2026
Upstream Advisory

Key facts

Risk
Medium · CVSS 6.4
Exploitation
Not marked as known exploited
Affected software
4 mapped packages or products
Fix availability
Not reported

Why this deserves its current priority

CVSS is 6.4. The current sources do not mark it as known exploited. Treat this as a source-backed prioritization signal, not a statement about your environment.

Analysis status

Analysis pending evidence review

Factual feed record only; HOL analysis is not approved for indexing. Read the methodology.

Affected scope and exposure questions

The current feed maps Red Hat/container-native-virtualization/virt-api (generic), Red Hat/container-native-virtualization/virt-api-rhel9 (generic). Check affected ranges and fixed versions before updating.

Affected products and reported versions
ProductAffected versionsFixed versions
cpe:2.3:a:kubevirt:kubevirt:-:*:*:*:*:kubernetes:*:*Not reportedNot reported
cpe:2.3:a:redhat:openshift_virtualization:*:*:*:*:*:*:*:*Not reportedNot reported
Mapped affected packages and fixed versions
PackageAffected rangeFixed version
Red Hat/container-native-virtualization/virt-apigeneric*Not reported
Red Hat/container-native-virtualization/virt-api-rhel9generic*Not reported

Recommended response

  1. 1Check inventory. Check lockfiles and deployed manifests for Red Hat/container-native-virtualization/virt-api, Red Hat/container-native-virtualization/virt-api-rhel9.
  2. 2Review the reported fix. Source-reported workaround: Users who do not use bridge binding or secondary-only network interfaces for their VMs are not affected by this vulnerability. For environments using these configurations, cluster administrators can apply egress NetworkPolicy to the openshift-cnv namespace to restrict virt-api's outbound connections to known-legitimate destinations (launcher pod CIDRs and node IPs), which blocks the SSRF to arbitrary targets.

Evidence timeline and material changes

  1. Published upstream

    Jun 25, 2026

    Evidence: source:cvelist:source_dates:source-dates:record

  2. Source modified

    Oct 25, 2026

    Evidence: source:cvelist:source_dates:source-dates:record

  3. First seen by HOL

    Jun 26, 2026

Sources and claim methodology

  • Source referenceaccess.redhat.com
  • Source referencebugzilla.redhat.com
Upstream source description

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.

Quoted source text, attributed separately from HOL analysis.

Record context

Vulnerability class
SSRF
EPSS
Not reported
CWE IDs
CWE-918
Source
CVE List V5
Source checked
Nov 3, 2026
References
2 linked sources
Open source record