Capsule TenantResource RawItems Cluster-Scoped Resource Creation Vulnerability_CVE-2026-22872

{
    "lastseen": "",
    "description": "Capsule is a multi-tenancy and policy-based framework for Kubernetes. The Capsule Controller runs with cluster-admin privileges. Although the TenantResource RawItems processing logic forcibly sets the namespace, this is ineffective for cluster-scoped resources. Prior to version 0.13.0, tenant administrators can leverage the Controller's elevated privileges to create cluster-scoped resources (such as ClusterRole and ValidatingWebhookConfiguration) that they cannot create directly, achieving cross-tenant privilege escalation and cluster-level attacks. The attack vector has a few limiting factors. This attack requires Tenant Owner privileges and requires Capsule Controller running with cluster-admin privileges (default configuration). Additionally, some clusters may have additional admission controllers blocking malicious resources. Version 0.13.0 patches this issue.",
    "published": "2026-06-01T17:42:38.376Z",
    "modified": "2026-06-01T17:42:38.376Z",
    "type": "cve",
    "title": "Capsule TenantResource RawItems Cluster-Scoped Resource Creation Vulnerability",
    "source": "GitHub_M",
    "references": "https://github.com/projectcapsule/capsule/security/advisories/GHSA-qjjm-7j9w-pw72\nhttps://github.com/projectcapsule/capsule/releases/tag/v0.13.0",
    "id": "CVE-2026-22872",
    "bulletinFamily": "",
    "cwe": [
        "CWE-20",
        "CWE-863"
    ],
    "cvelist": null,
    "sourceData": "projectcapsule capsule < 0.13.0",
    "sourceHref": "",
    "cvss": {
        "score": 6.9,
        "severity": "MEDIUM",
        "vector": "CVSS:4.0/AV:N/AC:L/AT:N/PR:H/UI:N/VC:N/VI:H/VA:N/SC:N/SI:H/SA:N/E:P",
        "version": "4.0"
    },
    "cvss2": [],
    "cvss3": {
        "version": "",
        "vectorString": "",
        "baseScore": 0,
        "baseSeverity": "",
        "attackVector": "",
        "attackComplexity": "",
        "privilegesRequired": "",
        "userInteraction": "",
        "scope": "",
        "confidentialityImpact": "",
        "integrityImpact": "",
        "availabilityImpact": "",
        "cvssV3": {
            "version": "",
            "vectorString": "",
            "baseScore": 0,
            "baseSeverity": "",
            "attackVector": "",
            "attackComplexity": "",
            "privilegesRequired": "",
            "userInteraction": "",
            "scope": "",
            "confidentialityImpact": "",
            "integrityImpact": "",
            "availabilityImpact": ""
        }
    },
    "href": "",
    "category_name": "CVE",
    "post_link": "",
    "product": "capsule",
    "version": "< 0.13.0",
    "vendor": "projectcapsule",
    "ai_description": "",
    "ai_severity": "",
    "ai_vendor": "",
    "ai_product": "",
    "ai_version": "",
    "ai_score": 0
}