CVE-2026-59694

CVE-2026-59694 affects ZenHive mpp (Elixir library) when configured as the fee payer. The issue occurs in MPP.Tempo.Transaction.cosign_fee_payer/3, which re-signs client-supplied base fields of the 0x76 AASigned envelope verbatim, including the EIP-2930 access list, without validating length or c...

CVE-2026-59694 Unbounded access list in mpp Tempo fee-payer inflates gas cost per payment

Improper Validation of Specified Quantity in Input in ZenHive mpp allows an unauthenticated remote client to inflate the fee-payer's gas cost per payment by a large multiplier, degrading the sponsor's operating margin. When the mpp Elixir library is configured as fee payer feepayer: true,...