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.
CVSS
No CVSS.
References
Configurations
No configuration.
History
17 Jul 2026, 13:18
| Type | Values Removed | Values Added |
|---|---|---|
| References | () https://github.com/ZenHive/mpp/security/advisories/GHSA-vj8p-hp9x-gh47 - |
17 Jul 2026, 11:17
| Type | Values Removed | Values Added |
|---|---|---|
| New CVE |
Information
Published : 2026-07-17 11:17
Updated : 2026-07-17 18:09
NVD link : CVE-2026-59252
Mitre link : CVE-2026-59252
CVE.ORG link : CVE-2026-59252
JSON object : View
Products Affected
No product.
CWE
CWE-1284
Improper Validation of Specified Quantity in Input