CVE-2026-82750

Improper Validation of Specified Quantity in Input in ZenHive mpp allows an unauthenticated remote client to inflate the fee-payer's gas cost per sponsored payment by a large multiplier and to have the sponsor pay for EIP-7702 account delegations of the client's choosing. When the server sponsors...

EEF-CVE-2026-82750 Unbounded EIP-7702 authorization list in mpp Tempo fee-payer sponsorship inflates gas cost and sponsors account delegation

Summary Improper Validation of Specified Quantity in Input in ZenHive mpp allows an unauthenticated remote client to inflate the fee-payer's gas cost per sponsored payment by a large multiplier and to have the sponsor pay for EIP-7702 account delegations of the client's choosing. When the server...

CVE-2026-82750

ZenHive mpp (versions 0.2.0 through before 0.16.1 ) contains a vulnerability in MPP.Methods.Tempo.FeePayerPolicy.measure/3 that fails to validate the aa_authorization_list field of client-signed 0x76 envelopes. An unauthenticated remote client can attach EIP-7702 delegation entries from throwaway...

EUVD-2026-72148

Improper Validation of Specified Quantity in Input in ZenHive mpp allows an unauthenticated remote client to inflate the fee-payer's gas cost per sponsored payment by a large multiplier and to have the sponsor pay for EIP-7702 account delegations of the client's choosing. When the server sponsors...

EUVD-2026-72147

Improper Validation of Specified Quantity in Input in ZenHive mpp allows an unauthenticated remote client to inflate the fee-payer's gas cost per sponsored payment by a large multiplier and to have the sponsor pay for provisioning an access key on the client's own account. When the server sponsor...

CVE-2026-82751

CVE-2026-82751 affects the ZenHive mpp library (Elixir), specifically MPP.Methods.Tempo.FeePayerPolicy.measure/3, in versions 0.2.0 through 0.16.0 . The function bounds gas fields, fee budgets, validity windows, and access lists of the client-signed 0x76 envelope but fails to check the optional k...