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CVE-2026-59252— Missing gas_limit validation in mpp Tempo fee-payer enables wallet drain

Quick assessment

Affected
ZenHive mpp
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

ZenHive MPP是ZenHive组织开源的一个高性能计算服务器。 ZenHive MPP 0.2.0版本至0.6.0之前版本存在输入验证错误漏洞，该漏洞源于对输入的gas_limit验证不当，可能导致未经身份验证的远程客户端耗尽付费方钱包，进而对合法客户端造成拒绝服务。

AI Predicted 7.5 Difficulty: Easy EPSS 0.63% · P48

Possible ATT&CK Techniques 1 AI

T1496 · Resource Hijacking

Affected Version Matrix 2

VendorProduct Version RangeStatus
ZenHive mpp 0.2.0< 0.6.0 affected
d29d54e507918db00a5b65d90136b73166c017d7< d84e3e528db39654540c2035ea0fbdf7b950d3d1 affected
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I. Basic Information for CVE-2026-59252

Vulnerability Information
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Vulnerability Title
Missing gas_limit validation in mpp Tempo fee-payer enables wallet drain
Source: CVE Program / CVE List V5
Vulnerability Description
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.
Source: CVE Program / CVE List V5
CVSS Information
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
Source: CVE Program / CVE List V5
Vulnerability Type
CWE-1284
Source: CVE Program / CVE List V5
Vulnerability Title
ZenHive MPP 输入验证错误漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
ZenHive MPP是ZenHive组织开源的一个高性能计算服务器。 ZenHive MPP 0.2.0版本至0.6.0之前版本存在输入验证错误漏洞，该漏洞源于对输入的gas_limit验证不当，可能导致未经身份验证的远程客户端耗尽付费方钱包，进而对合法客户端造成拒绝服务。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)

Affected Products

Vendor Product Affected Versions CPE Subscribe
ZenHive mpp 0.2.0 ~ 0.6.0 cpe:2.3:a:ZenHive:mpp:*:*:*:*:*:*:*:*
ZenHive mpp d29d54e507918db00a5b65d90136b73166c017d7 ~ d84e3e528db39654540c2035ea0fbdf7b950d3d1 cpe:2.3:a:ZenHive:mpp:*:*:*:*:*:*:*:*

II. Public POCs for CVE-2026-59252

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III. Intelligence Information for CVE-2026-59252

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Vendor Advisories for CVE-2026-59252 (3)

Same Patch Batch · ZenHive · 2026-07-17 · 3 CVEs total

CVE-2026-59695 Unbounded max_fee_per_gas in mpp Tempo fee-payer enables single-request wallet drain
CVE-2026-59694 Unbounded access list in mpp Tempo fee-payer inflates gas cost per payment

IV. Related Vulnerabilities

Same product: mpp
Same vendor: ZenHive
Same weakness: CWE-1284

V. Comments for CVE-2026-59252

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