{"dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": {"cveId": "CVE-2026-40304", "assignerOrgId": "a0819718-46f1-4df5-94e2-005712e83aaa", "state": "PUBLISHED", "assignerShortName": "GitHub_M", "dateReserved": "2026-04-10T21:41:54.504Z", "datePublished": "2026-04-17T21:04:23.648Z", "dateUpdated": "2026-04-20T14:57:24.486Z"}, "containers": {"cna": {"title": "zrok's broken ownership check in DELETE /api/v2/unaccess allows non-admin to delete global frontend records", "problemTypes": [{"descriptions": [{"cweId": "CWE-284", "lang": "en", "description": "CWE-284: Improper Access Control", "type": "CWE"}]}, {"descriptions": [{"cweId": "CWE-863", "lang": "en", "description": "CWE-863: Incorrect Authorization", "type": "CWE"}]}], "metrics": [{"cvssV3_1": {"attackComplexity": "HIGH", "attackVector": "NETWORK", "availabilityImpact": "HIGH", "baseScore": 5.3, "baseSeverity": "MEDIUM", "confidentialityImpact": "NONE", "integrityImpact": "NONE", "privilegesRequired": "LOW", "scope": "UNCHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:N/I:N/A:H", "version": "3.1"}}], "references": [{"name": "https://github.com/openziti/zrok/security/advisories/GHSA-3jpj-v3xr-5h6g", "tags": ["x_refsource_CONFIRM"], "url": "https://github.com/openziti/zrok/security/advisories/GHSA-3jpj-v3xr-5h6g"}, {"name": "https://github.com/openziti/zrok/releases/tag/v2.0.1", "tags": ["x_refsource_MISC"], "url": "https://github.com/openziti/zrok/releases/tag/v2.0.1"}], "affected": [{"vendor": "openziti", "product": "zrok", "versions": [{"version": "< 2.0.1", "status": "affected"}]}], "providerMetadata": {"orgId": "a0819718-46f1-4df5-94e2-005712e83aaa", "shortName": "GitHub_M", "dateUpdated": "2026-04-17T21:04:23.648Z"}, "descriptions": [{"lang": "en", "value": "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."}], "source": {"advisory": "GHSA-3jpj-v3xr-5h6g", "discovery": "UNKNOWN"}}, "adp": [{"metrics": [{"other": {"type": "ssvc", "content": {"timestamp": "2026-04-20T14:51:35.879686Z", "id": "CVE-2026-40304", "options": [{"Exploitation": "none"}, {"Automatable": "no"}, {"Technical Impact": "partial"}], "role": "CISA Coordinator", "version": "2.0.3"}}}], "title": "CISA ADP Vulnrichment", "providerMetadata": {"orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "shortName": "CISA-ADP", "dateUpdated": "2026-04-20T14:57:24.486Z"}}]}}

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{"cveTags": [], "descriptions": [{"lang": "en", "value": "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."}], "id": "CVE-2026-40304", "lastModified": "2026-04-20T19:03:07.607", "metrics": {"cvssMetricV31": [{"cvssData": {"attackComplexity": "HIGH", "attackVector": "NETWORK", "availabilityImpact": "HIGH", "baseScore": 5.3, "baseSeverity": "MEDIUM", "confidentialityImpact": "NONE", "integrityImpact": "NONE", "privilegesRequired": "LOW", "scope": "UNCHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:N/I:N/A:H", "version": "3.1"}, "exploitabilityScore": 1.6, "impactScore": 3.6, "source": "[email protected]", "type": "Secondary"}]}, "published": "2026-04-17T22:16:32.230", "references": [{"source": "[email protected]", "url": "https://github.com/openziti/zrok/releases/tag/v2.0.1"}, {"source": "[email protected]", "url": "https://github.com/openziti/zrok/security/advisories/GHSA-3jpj-v3xr-5h6g"}], "sourceIdentifier": "[email protected]", "vulnStatus": "Awaiting Analysis", "weaknesses": [{"description": [{"lang": "en", "value": "CWE-284"}, {"lang": "en", "value": "CWE-863"}], "source": "[email protected]", "type": "Primary"}]}

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