CVE-2026-59252 (GCVE-0-2026-59252)

Vulnerability from cvelistv5 – Published: 2026-07-17 10:11 – Updated: 2026-07-18 04:12
VLAI
Title
Missing gas_limit validation in mpp Tempo fee-payer enables wallet drain
Summary
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. When 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. The 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. This issue affects mpp: from 0.2.0 before 0.6.0.
Severity
8.2 (High)
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
SSVC
Exploitation: poc Automatable: no Technical Impact: partial
CISA Coordinator (v2.0.3)
CWE
  • CWE-1284 - Improper Validation of Specified Quantity in Input
Assigner
EEF
References
Impacted products
Vendor Product Version
ZenHive mpp Affected: 0.2.0 , < 0.6.0 (semver)
    cpe:2.3:a:ZenHive:mpp:*:*:*:*:*:*:*:*
 Create a notification for this product.
ZenHive mpp Affected: d29d54e507918db00a5b65d90136b73166c017d7 , < d84e3e528db39654540c2035ea0fbdf7b950d3d1 (git)
    cpe:2.3:a:ZenHive:mpp:*:*:*:*:*:*:*:*
 Create a notification for this product.
Credits
Kian Kai Ang E.FU Jonatan Männchen / EEF
Show details on NVD website
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      "containers": "{\"adp\": [{\"title\": \"CISA ADP Vulnrichment\", \"metrics\": [{\"other\": {\"type\": \"ssvc\", \"content\": {\"id\": \"CVE-2026-59252\", \"role\": \"CISA Coordinator\", \"options\": [{\"Exploitation\": \"poc\"}, {\"Automatable\": \"no\"}, {\"Technical Impact\": \"partial\"}], \"version\": \"2.0.3\", \"timestamp\": \"2026-07-17T12:21:12.801804Z\"}}}], \"references\": [{\"url\": \"https://github.com/ZenHive/mpp/security/advisories/GHSA-vj8p-hp9x-gh47\", \"tags\": [\"exploit\"]}], \"providerMetadata\": {\"orgId\": \"134c704f-9b21-4f2e-91b3-4a467353bcc0\", \"shortName\": \"CISA-ADP\", \"dateUpdated\": \"2026-07-17T12:20:25.349Z\"}}], \"cna\": {\"title\": \"Missing gas_limit validation in mpp Tempo fee-payer enables wallet drain\", \"source\": {\"discovery\": \"EXTERNAL\"}, \"credits\": [{\"lang\": \"en\", \"type\": \"finder\", \"value\": \"Kian Kai Ang\"}, {\"lang\": \"en\", \"type\": \"remediation developer\", \"value\": \"E.FU\"}, {\"lang\": \"en\", \"type\": \"analyst\", \"value\": \"Jonatan M\\u00e4nnchen / EEF\"}], \"impacts\": [{\"capecId\": \"CAPEC-130\", \"descriptions\": [{\"lang\": \"en\", \"value\": \"CAPEC-130 Excessive Allocation\"}]}], \"metrics\": [{\"format\": \"CVSS\", \"cvssV4_0\": {\"version\": \"4.0\", \"baseScore\": 8.2, \"attackVector\": \"NETWORK\", \"baseSeverity\": \"HIGH\", \"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\", \"userInteraction\": \"NONE\", \"attackComplexity\": \"LOW\", \"attackRequirements\": \"PRESENT\", \"privilegesRequired\": \"NONE\", \"subIntegrityImpact\": \"NONE\", \"vulnIntegrityImpact\": \"NONE\", \"subAvailabilityImpact\": \"NONE\", \"vulnAvailabilityImpact\": \"HIGH\", \"subConfidentialityImpact\": \"NONE\", \"vulnConfidentialityImpact\": \"NONE\"}, \"scenarios\": [{\"lang\": \"en\", \"value\": \"GENERAL\"}]}], \"affected\": [{\"cpes\": [\"cpe:2.3:a:ZenHive:mpp:*:*:*:*:*:*:*:*\"], \"repo\": \"https://github.com/ZenHive/mpp\", \"vendor\": \"ZenHive\", \"modules\": [\"\u0027Elixir.MPP.Methods.Tempo\u0027\"], \"product\": \"mpp\", \"versions\": [{\"status\": \"affected\", \"version\": \"0.2.0\", \"lessThan\": \"0.6.0\", \"versionType\": \"semver\"}], \"packageURL\": \"pkg:hex/mpp\", \"packageName\": \"mpp\", \"programFiles\": [\"lib/mpp/methods/tempo.ex\"], \"collectionURL\": \"https://repo.hex.pm\", \"defaultStatus\": \"unaffected\", \"programRoutines\": [{\"name\": \"\u0027Elixir.MPP.Methods.Tempo\u0027:broadcast_and_verify/7\"}]}, {\"cpes\": [\"cpe:2.3:a:ZenHive:mpp:*:*:*:*:*:*:*:*\"], \"repo\": \"https://github.com/ZenHive/mpp\", \"vendor\": \"ZenHive\", \"modules\": [\"\u0027Elixir.MPP.Methods.Tempo\u0027\"], \"product\": \"mpp\", \"versions\": [{\"status\": \"affected\", \"version\": \"d29d54e507918db00a5b65d90136b73166c017d7\", \"lessThan\": \"d84e3e528db39654540c2035ea0fbdf7b950d3d1\", \"versionType\": \"git\"}], \"packageURL\": \"pkg:github/ZenHive/mpp\", \"packageName\": \"ZenHive/mpp\", \"programFiles\": [\"lib/mpp/methods/tempo.ex\"], \"collectionURL\": \"https://github.com\", \"defaultStatus\": \"unaffected\", \"programRoutines\": [{\"name\": \"\u0027Elixir.MPP.Methods.Tempo\u0027:broadcast_and_verify/7\"}]}], \"references\": [{\"url\": \"https://github.com/ZenHive/mpp/security/advisories/GHSA-vj8p-hp9x-gh47\", \"tags\": [\"vendor-advisory\", \"related\"]}, {\"url\": \"https://cna.erlef.org/cves/CVE-2026-59252.html\", \"tags\": [\"related\"]}, {\"url\": \"https://osv.dev/vulnerability/EEF-CVE-2026-59252\", \"tags\": [\"related\"]}, {\"url\": \"https://github.com/ZenHive/mpp/commit/d84e3e528db39654540c2035ea0fbdf7b950d3d1\", \"tags\": [\"patch\"]}], \"x_generator\": {\"engine\": \"cvelib 1.8.0\"}, \"descriptions\": [{\"lang\": \"en\", \"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.\", \"supportingMedia\": [{\"type\": \"text/html\", \"value\": \"\u003cp\u003eImproper 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.\u003c/p\u003e\u003cp\u003eWhen the \u003ctt\u003empp\u003c/tt\u003e Elixir library is configured as fee payer (\u003ctt\u003efee_payer: true\u003c/tt\u003e), the \u003ctt\u003eMPP.Methods.Tempo\u003c/tt\u003e payment method co-signs and broadcasts a client-supplied EVM transaction without first validating that the client-supplied \u003ctt\u003egas_limit\u003c/tt\u003e is sufficient to complete the intended call. A malicious client can submit a signed \u003ctt\u003etransferWithMemo\u003c/tt\u003e transaction with \u003ctt\u003egas_limit\u003c/tt\u003e deliberately set just below the amount required for successful execution. The server co-signs the transaction and broadcasts it via \u003ctt\u003erpc_broadcast_sync\u003c/tt\u003e. 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.\u003c/p\u003e\u003cp\u003eThe \u003ctt\u003ewait_for_confirmation = false\u003c/tt\u003e (optimistic) path is also affected: it invokes \u003ctt\u003esimulate_payment_call\u003c/tt\u003e via \u003ctt\u003eeth_call\u003c/tt\u003e, but that simulation omits the \u003ctt\u003egas\u003c/tt\u003e parameter and therefore does not catch out-of-gas conditions.\u003c/p\u003e\u003cp\u003eThis issue affects mpp: from 0.2.0 before 0.6.0.\u003c/p\u003e\", \"base64\": false}]}], \"problemTypes\": [{\"descriptions\": [{\"lang\": \"en\", \"type\": \"CWE\", \"cweId\": \"CWE-1284\", \"description\": \"CWE-1284 Improper Validation of Specified Quantity in Input\"}]}], \"configurations\": [{\"lang\": \"en\", \"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.\", \"supportingMedia\": [{\"type\": \"text/html\", \"value\": \"\u003cp\u003eThe vulnerable code path is only reachable when the \u003ctt\u003eMPP.Methods.Tempo\u003c/tt\u003e method is configured with \u003ctt\u003efee_payer: true\u003c/tt\u003e (server-side gas sponsorship). Default deployments with \u003ctt\u003efee_payer: false\u003c/tt\u003e are not affected, since the client pays for gas out of its own wallet.\u003c/p\u003e\", \"base64\": false}]}], \"cpeApplicability\": [{\"nodes\": [{\"negate\": false, \"cpeMatch\": [{\"criteria\": \"cpe:2.3:a:ZenHive:mpp:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"0.6.0\", \"versionStartIncluding\": \"0.2.0\"}], \"operator\": \"AND\"}], \"operator\": \"OR\"}], \"providerMetadata\": {\"orgId\": \"6b3ad84c-e1a6-4bf7-a703-f496b71e49db\", \"shortName\": \"EEF\", \"dateUpdated\": \"2026-07-18T04:12:42.459Z\"}}}",
      "cveMetadata": "{\"cveId\": \"CVE-2026-59252\", \"state\": \"PUBLISHED\", \"dateUpdated\": \"2026-07-18T04:12:42.459Z\", \"dateReserved\": \"2026-07-04T04:24:03.653Z\", \"assignerOrgId\": \"6b3ad84c-e1a6-4bf7-a703-f496b71e49db\", \"datePublished\": \"2026-07-17T10:11:54.436Z\", \"assignerShortName\": \"EEF\"}",
      "dataType": "CVE_RECORD",
      "dataVersion": "5.2"
    }
  }
}



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Forecast uses a logistic model when the trend is rising, or an exponential decay model when the trend is falling. Fitted via linearized least squares.

Sightings

Author Source Type Date Other

Nomenclature

  • Seen: The vulnerability was mentioned, discussed, or observed by the user.
  • Confirmed: The vulnerability has been validated from an analyst's perspective.
  • Published Proof of Concept: A public proof of concept is available for this vulnerability.
  • Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
  • Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
  • Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
  • Not confirmed: The user expressed doubt about the validity of the vulnerability.
  • Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.


Detection rules are retrieved from Rulezet.