CVE-2026-17527

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CDI's DataVolume clone authorization accepts this permission as sufficient to authorize cloning the contents of any PVC the caller can name, without requiring write access to the source namespace. A user or service account bound to the view role, commonly granted cluster-wide via ClusterRoleBinding, who also has ordinary write access (edit/admin) to any single namespace, can use this to exfiltrate the contents of any PVC in the cluster into a namespace they control, bypassing namespace isolation and the read-only guarantee of the view role."}, {"lang": "es", "value": "En containerized-data-importer (CDI), el ClusterRole agregado cdi.kubevirt.io:view, destinado a proporcionar acceso de solo lectura a los recursos de CDI, incluye una regla que otorga create en el subrecurso datavolumes/source. La autorizaci\u00f3n de clonaci\u00f3n de DataVolume de CDI acepta este permiso como suficiente para autorizar la clonaci\u00f3n del contenido de cualquier PVC que el llamador pueda nombrar, sin requerir acceso de escritura al espacio de nombres de origen. Un usuario o cuenta de servicio vinculado al rol view, com\u00fanmente otorgado a nivel de cl\u00faster a trav\u00e9s de ClusterRoleBinding, que tambi\u00e9n tiene acceso de escritura ordinario (edit/admin) a cualquier espacio de nombres \u00fanico, puede usar esto para exfiltrar el contenido de cualquier PVC en el cl\u00faster a un espacio de nombres que controlen, eludiendo el aislamiento del espacio de nombres y la garant\u00eda de solo lectura del rol view."}], "id": "CVE-2026-17527", "lastModified": "2026-11-03T04:16:49.137", "metrics": {"cvssMetricV31": [{"cvssData": {"attackComplexity": "LOW", "attackVector": "NETWORK", "availabilityImpact": "NONE", "baseScore": 7.7, "baseSeverity": "HIGH", "confidentialityImpact": "HIGH", "integrityImpact": "NONE", "privilegesRequired": "LOW", "scope": "CHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:N/A:N", "version": "3.1"}, "exploitabilityScore": 3.1, "impactScore": 4.0, "source": "secalert@redhat.com", "type": "Secondary"}], "ssvcV203": [{"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "ssvcData": {"id": "CVE-2026-17527", "options": [{"exploitation": "none"}, {"automatable": "no"}, {"technicalImpact": "partial"}], "role": "CISA Coordinator", "timestamp": "2026-07-27T18:09:12.042841Z", "version": "2.0.3"}}]}, "published": "2026-07-27T10:16:37.617", "references": [{"source": "secalert@redhat.com", "url": "https://access.redhat.com/errata/RHSA-2026:59062"}, {"source": "secalert@redhat.com", "url": "https://access.redhat.com/errata/RHSA-2026:59083"}, {"source": "secalert@redhat.com", "url": "https://access.redhat.com/errata/RHSA-2026:59109"}, {"source": "secalert@redhat.com", "url": "https://access.redhat.com/errata/RHSA-2026:60117"}, {"source": "secalert@redhat.com", "url": "https://access.redhat.com/errata/RHSA-2026:60301"}, {"source": "secalert@redhat.com", "url": "https://access.redhat.com/errata/RHSA-2026:61666"}, {"source": "secalert@redhat.com", "url": "https://access.redhat.com/errata/RHSA-2026:62599"}, {"source": "secalert@redhat.com", "url": "https://access.redhat.com/errata/RHSA-2026:93958"}, {"source": "secalert@redhat.com", "url": "https://access.redhat.com/security/cve/CVE-2026-17527"}, {"source": "secalert@redhat.com", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2507413"}], "sourceIdentifier": "secalert@redhat.com", "vulnStatus": "Awaiting Analysis", "weaknesses": [{"description": [{"lang": "en", "value": "CWE-639"}], "source": "secalert@redhat.com", "type": "Secondary"}]}

{"bugzilla": {"description": "virt-cdi-operator: containerized-data-importer: cdi.kubevirt.io:view aggregated ClusterRole grants create on datavolumes/source, allowing unauthorized PVC clone", "id": "2507413", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2507413"}, "csaw": false, "cvss3": {"cvss3_base_score": "7.7", "cvss3_scoring_vector": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:N/A:N", "status": "draft"}, "cwe": "CWE-639", "details": ["In containerized-data-importer (CDI), the aggregated cdi.kubevirt.io:view ClusterRole, intended to provide read-only access to CDI resources, includes a rule granting create on the datavolumes/source subresource. CDI's DataVolume clone authorization accepts this permission as sufficient to authorize cloning the contents of any PVC the caller can name, without requiring write access to the source namespace. A user or service account bound to the view role, commonly granted cluster-wide via ClusterRoleBinding, who also has ordinary write access (edit/admin) to any single namespace, can use this to exfiltrate the contents of any PVC in the cluster into a namespace they control, bypassing namespace isolation and the read-only guarantee of the view role."], "mitigation": {"lang": "en:us", "value": "Until a fix is available, cluster administrators should avoid granting cdi.kubevirt.io:view (or the built-in Kubernetes view role, which aggregates it) via cluster-wide ClusterRoleBinding. Prefer namespace-scoped RoleBindings, and audit which namespaces grant both view-equivalent access and separate edit/admin access to the same identities, since that combination is what enables cross-namespace data exfiltration."}, "name": "CVE-2026-17527", "package_state": [{"cpe": "cpe:/a:redhat:container_native_virtualization:4", "fix_state": "Affected", "impact": "important", "package_name": "container-native-virtualization/virt-cdi-operator", "product_name": "Red Hat OpenShift Virtualization 4"}, {"cpe": "cpe:/a:redhat:container_native_virtualization:4", "fix_state": "Affected", "package_name": "container-native-virtualization/virt-cdi-operator-rhel9", "product_name": "Red Hat OpenShift Virtualization 4"}], "public_date": "2026-07-27T00:00:00Z", "references": ["https://www.cve.org/CVERecord?id=CVE-2026-17527\nhttps://nvd.nist.gov/vuln/detail/CVE-2026-17527"], "statement": "This flaw is confirmed upstream in kubevirt/containerized-data-importer and affects all downstream consumers using CDI's default aggregated RBAC roles, including OpenShift Virtualization. It is distinct from the SSP operator's \"golden images\" pattern, which deliberately and correctly scopes an equivalent permission via a namespace-scoped Role/RoleBinding.", "threat_severity": "Important"}

{"affected": [{"configurations": [{"platform": null, "status": "affected", "versions": null}], "enrichment": {"confidence": 85.0, "confidence_source": "matching", "scores": [{"score": 85.0, "source": "matching"}]}, "original": {"product": "Red Hat OpenShift Virtualization 4", "source": "cna", "vendor": "Red Hat"}, "product": "openshift_virtualization", "vendor": "redhat"}], "created": "2026-07-27T15:15:12.464627+00:00", "updated": "2026-08-03T18:00:11.176006+00:00", "vendors": ["redhat", "redhat$PRODUCT$openshift_virtualization"], "weaknesses": ["CWE-639"]}