zrok’s broken ownership check in DELETE /api/v2/unaccess allows non-admin to delete global frontend records_CVE-2026-40304

{
    "lastseen": "",
    "description": "zrok is software for sharing web services, files, and network resources. Prior to version 2.0.1, the unaccess handler (controller/unaccess.go) contains a logical error in its ownership guard: when a frontend record has environment_id = NULL (the marker for admin-created global frontends), the condition short-circuits to false and allows the deletion to proceed without any ownership verification. A non-admin user who knows a global frontend token can call DELETE /api/v2/unaccess with any of their own environment IDs and permanently delete the global frontend, taking down all public shares routed through it. Version 2.0.1 patches the issue.",
    "published": "2026-04-17T21:04:23.648Z",
    "modified": "2026-04-17T21:04:23.648Z",
    "type": "cve",
    "title": "zrok's broken ownership check in DELETE /api/v2/unaccess allows non-admin to delete global frontend records",
    "source": "GitHub_M",
    "references": "https://github.com/openziti/zrok/security/advisories/GHSA-3jpj-v3xr-5h6g\nhttps://github.com/openziti/zrok/releases/tag/v2.0.1",
    "id": "CVE-2026-40304",
    "bulletinFamily": "",
    "cwe": [
        "CWE-284",
        "CWE-863"
    ],
    "cvelist": null,
    "sourceData": "openziti zrok < 2.0.1",
    "sourceHref": "",
    "cvss": {
        "score": 5.3,
        "severity": "MEDIUM",
        "vector": "CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:N/I:N/A:H",
        "version": "3.1"
    },
    "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": "zrok",
    "version": "< 2.0.1",
    "vendor": "openziti",
    "ai_description": "",
    "ai_severity": "",
    "ai_vendor": "",
    "ai_product": "",
    "ai_version": "",
    "ai_score": 0
}