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vuln-cve/data/2026/59xxx/CVE-2026-59252.json
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{
"dataType": "CVE_RECORD",
"dataVersion": "5.2",
"cveMetadata": {
"cveId": "CVE-2026-59252",
"assignerOrgId": "6b3ad84c-e1a6-4bf7-a703-f496b71e49db",
"state": "PUBLISHED",
"assignerShortName": "EEF",
"dateReserved": "2026-07-04T04:24:03.653Z",
"datePublished": "2026-07-17T10:11:54.436Z",
"dateUpdated": "2026-07-18T04:12:42.459Z"
},
"containers": {
"cna": {
"affected": [
{
"collectionURL": "https://repo.hex.pm",
"cpes": [
"cpe:2.3:a:ZenHive:mpp:*:*:*:*:*:*:*:*"
],
"defaultStatus": "unaffected",
"modules": [
"'Elixir.MPP.Methods.Tempo'"
],
"packageName": "mpp",
"packageURL": "pkg:hex/mpp",
"product": "mpp",
"programFiles": [
"lib/mpp/methods/tempo.ex"
],
"programRoutines": [
{
"name": "'Elixir.MPP.Methods.Tempo':broadcast_and_verify/7"
}
],
"repo": "https://github.com/ZenHive/mpp",
"vendor": "ZenHive",
"versions": [
{
"lessThan": "0.6.0",
"status": "affected",
"version": "0.2.0",
"versionType": "semver"
}
]
},
{
"collectionURL": "https://github.com",
"cpes": [
"cpe:2.3:a:ZenHive:mpp:*:*:*:*:*:*:*:*"
],
"defaultStatus": "unaffected",
"modules": [
"'Elixir.MPP.Methods.Tempo'"
],
"packageName": "ZenHive/mpp",
"packageURL": "pkg:github/ZenHive/mpp",
"product": "mpp",
"programFiles": [
"lib/mpp/methods/tempo.ex"
],
"programRoutines": [
{
"name": "'Elixir.MPP.Methods.Tempo':broadcast_and_verify/7"
}
],
"repo": "https://github.com/ZenHive/mpp",
"vendor": "ZenHive",
"versions": [
{
"lessThan": "d84e3e528db39654540c2035ea0fbdf7b950d3d1",
"status": "affected",
"version": "d29d54e507918db00a5b65d90136b73166c017d7",
"versionType": "git"
}
]
}
],
"configurations": [
{
"lang": "en",
"supportingMedia": [
{
"base64": false,
"type": "text/html",
"value": "<p>The vulnerable code path is only reachable when the <tt>MPP.Methods.Tempo</tt> method is configured with <tt>fee_payer: true</tt> (server-side gas sponsorship). Default deployments with <tt>fee_payer: false</tt> are not affected, since the client pays for gas out of its own wallet.</p>"
}
],
"value": "The vulnerable code path is only reachable when the MPP.Methods.Tempo method is configured with fee_payer: true (server-side gas sponsorship). Default deployments with fee_payer: false are not affected, since the client pays for gas out of its own wallet."
}
],
"cpeApplicability": [
{
"nodes": [
{
"cpeMatch": [
{
"criteria": "cpe:2.3:a:ZenHive:mpp:*:*:*:*:*:*:*:*",
"versionEndExcluding": "0.6.0",
"versionStartIncluding": "0.2.0",
"vulnerable": true
}
],
"negate": false,
"operator": "AND"
}
],
"operator": "OR"
}
],
"credits": [
{
"lang": "en",
"type": "finder",
"value": "Kian Kai Ang"
},
{
"lang": "en",
"type": "remediation developer",
"value": "E.FU"
},
{
"lang": "en",
"type": "analyst",
"value": "Jonatan Männchen / EEF"
}
],
"descriptions": [
{
"lang": "en",
"supportingMedia": [
{
"base64": false,
"type": "text/html",
"value": "<p>Improper Validation of Specified Quantity in Input in ZenHive mpp allows an unauthenticated remote client to drain the fee-payer wallet, resulting in denial of service for legitimate clients.</p><p>When the <tt>mpp</tt> Elixir library is configured as fee payer (<tt>fee_payer: true</tt>), the <tt>MPP.Methods.Tempo</tt> payment method co-signs and broadcasts a client-supplied EVM transaction without first validating that the client-supplied <tt>gas_limit</tt> is sufficient to complete the intended call. A malicious client can submit a signed <tt>transferWithMemo</tt> transaction with <tt>gas_limit</tt> deliberately set just below the amount required for successful execution. The server co-signs the transaction and broadcasts it via <tt>rpc_broadcast_sync</tt>. The transaction runs out of gas during EVM execution and reverts, but the fee-payer wallet is still charged for the burned gas while the client pays nothing and receives no resource. Repeated requests from one or more malicious clients drain the fee-payer wallet at near-zero cost to the attacker, ultimately preventing the server from sponsoring gas for legitimate payment requests.</p><p>The <tt>wait_for_confirmation = false</tt> (optimistic) path is also affected: it invokes <tt>simulate_payment_call</tt> via <tt>eth_call</tt>, but that simulation omits the <tt>gas</tt> parameter and therefore does not catch out-of-gas conditions.</p><p>This issue affects mpp: from 0.2.0 before 0.6.0.</p>"
}
],
"value": "Improper Validation of Specified Quantity in Input in ZenHive mpp allows an unauthenticated remote client to drain the fee-payer wallet, resulting in denial of service for legitimate clients.\n\nWhen the mpp Elixir library is configured as fee payer (fee_payer: true), the MPP.Methods.Tempo payment method co-signs and broadcasts a client-supplied EVM transaction without first validating that the client-supplied gas_limit is sufficient to complete the intended call. A malicious client can submit a signed transferWithMemo transaction with gas_limit deliberately set just below the amount required for successful execution. The server co-signs the transaction and broadcasts it via rpc_broadcast_sync. The transaction runs out of gas during EVM execution and reverts, but the fee-payer wallet is still charged for the burned gas while the client pays nothing and receives no resource. Repeated requests from one or more malicious clients drain the fee-payer wallet at near-zero cost to the attacker, ultimately preventing the server from sponsoring gas for legitimate payment requests.\n\nThe wait_for_confirmation = false (optimistic) path is also affected: it invokes simulate_payment_call via eth_call, but that simulation omits the gas parameter and therefore does not catch out-of-gas conditions.\n\nThis issue affects mpp: from 0.2.0 before 0.6.0."
}
],
"impacts": [
{
"capecId": "CAPEC-130",
"descriptions": [
{
"lang": "en",
"value": "CAPEC-130 Excessive Allocation"
}
]
}
],
"metrics": [
{
"cvssV4_0": {
"attackComplexity": "LOW",
"attackRequirements": "PRESENT",
"attackVector": "NETWORK",
"baseScore": 8.2,
"baseSeverity": "HIGH",
"privilegesRequired": "NONE",
"subAvailabilityImpact": "NONE",
"subConfidentialityImpact": "NONE",
"subIntegrityImpact": "NONE",
"userInteraction": "NONE",
"vectorString": "CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N",
"version": "4.0",
"vulnAvailabilityImpact": "HIGH",
"vulnConfidentialityImpact": "NONE",
"vulnIntegrityImpact": "NONE"
},
"format": "CVSS",
"scenarios": [
{
"lang": "en",
"value": "GENERAL"
}
]
}
],
"problemTypes": [
{
"descriptions": [
{
"cweId": "CWE-1284",
"description": "CWE-1284 Improper Validation of Specified Quantity in Input",
"lang": "en",
"type": "CWE"
}
]
}
],
"providerMetadata": {
"orgId": "6b3ad84c-e1a6-4bf7-a703-f496b71e49db",
"shortName": "EEF",
"dateUpdated": "2026-07-18T04:12:42.459Z"
},
"references": [
{
"tags": [
"vendor-advisory",
"related"
],
"url": "https://github.com/ZenHive/mpp/security/advisories/GHSA-vj8p-hp9x-gh47"
},
{
"tags": [
"related"
],
"url": "https://cna.erlef.org/cves/CVE-2026-59252.html"
},
{
"tags": [
"related"
],
"url": "https://osv.dev/vulnerability/EEF-CVE-2026-59252"
},
{
"tags": [
"patch"
],
"url": "https://github.com/ZenHive/mpp/commit/d84e3e528db39654540c2035ea0fbdf7b950d3d1"
}
],
"source": {
"discovery": "EXTERNAL"
},
"title": "Missing gas_limit validation in mpp Tempo fee-payer enables wallet drain",
"x_generator": {
"engine": "cvelib 1.8.0"
}
},
"adp": [
{
"references": [
{
"url": "https://github.com/ZenHive/mpp/security/advisories/GHSA-vj8p-hp9x-gh47",
"tags": [
"exploit"
]
}
],
"metrics": [
{
"other": {
"type": "ssvc",
"content": {
"timestamp": "2026-07-17T12:21:12.801804Z",
"id": "CVE-2026-59252",
"options": [
{
"Exploitation": "poc"
},
{
"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": "2026-07-17T12:21:18.794Z"
}
}
]
}
}
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