{"id":"CVE-2026-13218","sourceIdentifier":"secalert@redhat.com","published":"2026-06-26T00:16:51.147","lastModified":"2026-10-25T22:10:00.150","vulnStatus":"Analyzed","cveTags":[],"descriptions":[{"lang":"en","value":"A flaw was found in KubeVirt's virt-handler network cache handling. The WriteToCachedFile function writes data to a launcher-rooted path using os.WriteFile and os.Chown without symlink protection. A user with access to the virt-launcher container can plant a symlink at the cache file path, causing virt-handler to follow it and overwrite an arbitrary host file with JSON content and change its ownership."},{"lang":"es","value":"Se encontró una vulnerabilidad en el manejo de la caché de red del virt-gestor de KubeVirt. La función WriteToCachedFile escribe datos en una ruta con raíz en el lanzador utilizando os.WriteFile y os.Chown sin protección contra enlaces simbólicos. Un usuario con acceso al contenedor virt-launcher puede colocar un enlace simbólico en la ruta del archivo de caché, haciendo que el virt-gestor lo siga y sobrescriba un archivo de host arbitrario con contenido JSON y cambie su propiedad."}],"affected":[{"source":"secalert@redhat.com","affectedData":[{"vendor":"Red Hat","product":"Red Hat OpenShift Virtualization 4","defaultStatus":"affected","collectionURL":"https://access.redhat.com/downloads/content/package-browser/","packageName":"container-native-virtualization/virt-handler","cpes":["cpe:/a:redhat:container_native_virtualization:4"]},{"vendor":"Red Hat","product":"Red Hat OpenShift Virtualization 4","defaultStatus":"affected","collectionURL":"https://access.redhat.com/downloads/content/package-browser/","packageName":"container-native-virtualization/virt-handler-rhel9","cpes":["cpe:/a:redhat:container_native_virtualization:4"]}]}],"metrics":{"cvssMetricV31":[{"source":"secalert@redhat.com","type":"Secondary","cvssData":{"version":"3.1","vectorString":"CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:C/C:N/I:L/A:L","baseScore":4.2,"baseSeverity":"MEDIUM","attackVector":"LOCAL","attackComplexity":"HIGH","privilegesRequired":"LOW","userInteraction":"NONE","scope":"CHANGED","confidentialityImpact":"NONE","integrityImpact":"LOW","availabilityImpact":"LOW"},"exploitabilityScore":1.1,"impactScore":2.7}],"ssvcV203":[{"source":"134c704f-9b21-4f2e-91b3-4a467353bcc0","ssvcData":{"timestamp":"2026-06-26T14:58:08.187830Z","id":"CVE-2026-13218","options":[{"exploitation":"none"},{"automatable":"no"},{"technicalImpact":"partial"}],"role":"CISA Coordinator","version":"2.0.3"}}]},"weaknesses":[{"source":"secalert@redhat.com","type":"Secondary","description":[{"lang":"en","value":"CWE-61"}]}],"configurations":[{"nodes":[{"operator":"OR","negate":false,"cpeMatch":[{"vulnerable":true,"criteria":"cpe:2.3:a:kubevirt:kubevirt:-:*:*:*:*:kubernetes:*:*","matchCriteriaId":"06AF9668-6158-47F4-A755-0EE4D5F7F413"},{"vulnerable":true,"criteria":"cpe:2.3:a:redhat:openshift_virtualization:*:*:*:*:*:*:*:*","versionStartIncluding":"4","versionEndIncluding":"4.22.0","matchCriteriaId":"5301905C-9B5C-479F-A69A-659C6CB3AA42"}]}]}],"references":[{"url":"https://access.redhat.com/security/cve/CVE-2026-13218","source":"secalert@redhat.com","tags":["Vendor Advisory","Mitigation"]},{"url":"https://bugzilla.redhat.com/show_bug.cgi?id=2492654","source":"secalert@redhat.com","tags":["Issue Tracking","Vendor Advisory"]}]}