{"id":"CVE-2023-26484","aliases":["GHSA-cp96-jpmq-xrr2"],"url":"https://o3.security/vulnerability/CVE-2023-26484","summary":"On a compromised KubeVirt node, the virt-handler service account can be used to modify all node specs","details":"KubeVirt is a virtual machine management add-on for Kubernetes. In versions 0.59.0 and prior, if a malicious user has taken over a Kubernetes node where virt-handler (the KubeVirt node-daemon) is running, the virt-handler service account can be used to modify all node specs. This can be misused to lure-in system-level-privileged components which can, for instance, read all secrets on the cluster, or can exec into pods on other nodes. This way, a compromised node can be used to elevate privileges beyond the node until potentially having full privileged access to the whole cluster. The simplest way to exploit this, once a user could compromise a specific node, is to set with the virt-handler service account all other nodes to unschedulable and simply wait until system-critical components with high privileges appear on its node. No patches are available as of time of publication. As a workaround, gatekeeper users can add a webhook which will block the `virt-handler` service account to modify the spec of a node.","published":"2023-03-15T20:40:17.424Z","modified":"2026-07-15T01:49:06.859442447Z","cvss":{"score":8.2,"severity":"HIGH","vector":"CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:C/C:H/I:H/A:N"},"epss":null,"cisaKev":null,"exploitsKnown":0,"affectedPackages":[{"ecosystem":"Go","name":"kubevirt.io/kubevirt","fixedVersion":null}],"fix":null,"references":[{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2023/26xxx/CVE-2023-26484.json"},{"type":"ADVISORY","url":"https://github.com/kubevirt/kubevirt/security/advisories/GHSA-cp96-jpmq-xrr2"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2023-26484"},{"type":"REPORT","url":"https://github.com/kubevirt/kubevirt/issues/9109"}],"provenance":{"sources":["OSV.dev","FIRST.org (EPSS)"],"lastVerified":"2026-07-15T01:49:06.859442447Z"}}