{"dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": {"cveId": "CVE-2026-67581", "assignerOrgId": "6b3ad84c-e1a6-4bf7-a703-f496b71e49db", "state": "PUBLISHED", "assignerShortName": "EEF", "dateReserved": "2026-08-18T10:30:01.759Z", "datePublished": "2026-08-19T17:20:09.606Z", "dateUpdated": "2026-08-19T18:44:31.945Z"}, "containers": {"cna": {"affected": [{"collectionURL": "https://repo.hex.pm", "cpes": ["cpe:2.3:a:ZenHive:mpp:*:*:*:*:*:*:*:*"], "defaultStatus": "unaffected", "modules": ["'Elixir.MPP.Methods.EVM'"], "packageName": "mpp", "packageURL": "pkg:hex/mpp", "product": "mpp", "programFiles": ["lib/mpp/methods/evm.ex"], "programRoutines": [{"name": "'Elixir.MPP.Methods.EVM':verify/2"}], "repo": "https://github.com/ZenHive/mpp", "vendor": "ZenHive", "versions": [{"lessThan": "0.6.3", "status": "affected", "version": "0.3.0", "versionType": "semver"}]}, {"collectionURL": "https://github.com", "cpes": ["cpe:2.3:a:ZenHive:mpp:*:*:*:*:*:*:*:*"], "defaultStatus": "unaffected", "modules": ["'Elixir.MPP.Methods.EVM'"], "packageName": "zenhive/mpp", "packageURL": "pkg:github/zenhive/mpp", "product": "mpp", "programFiles": ["lib/mpp/methods/evm.ex"], "programRoutines": [{"name": "'Elixir.MPP.Methods.EVM':verify/2"}], "repo": "https://github.com/ZenHive/mpp", "vendor": "ZenHive", "versions": [{"lessThan": "ecc038088b1cda09ad8a84acc6cc112addb4a68f", "status": "affected", "version": "65b9e425ce27631c786a5b380b5e4c5ae607ec6d", "versionType": "git"}]}], "cpeApplicability": [{"nodes": [{"cpeMatch": [{"criteria": "cpe:2.3:a:ZenHive:mpp:*:*:*:*:*:*:*:*", "versionEndExcluding": "0.6.3", "versionStartIncluding": "0.3.0", "vulnerable": true}], "negate": false, "operator": "OR"}], "operator": "AND"}], "credits": [{"lang": "en", "type": "finder", "value": "E.FU"}, {"lang": "en", "type": "remediation developer", "value": "E.FU"}, {"lang": "en", "type": "analyst", "value": "Jonatan M\u00e4nnchen / EEF"}], "datePublic": "2026-07-06T00:00:00.000Z", "descriptions": [{"lang": "en", "supportingMedia": [{"base64": false, "type": "text/html", "value": "<p>Authentication Bypass by Capture-replay in ZenHive mpp allows an unauthenticated remote client to obtain paid resources by resubmitting one settled on-chain transfer.</p>\n<p><code>MPP.Methods.EVM.verify/2</code> accepts a transaction-hash credential and matches a transfer purely on <code>token</code>, <code>to</code> and <code>amount</code> (ERC-20) or <code>to</code> and <code>value</code> (native). 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