CVE-2026-63628 mppx: Gas Draining with access list

mppx is a TypeScript interface for machine payments protocol. Prior to 0.8.2, the fee-payer cosigning path in src/tempo/internal/fee-payer.ts copied a client-supplied accesslist from a 0x78 FeePayerEnvelope without validating its length or contents. Because EIP-2930 access-list entries consume...

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,...

CVE-2026-59694: Improper Validation of Specified Quantity in Input

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,...

PT-2026-60735

Name of the Vulnerable Software and Affected Versions mpp versions 0.2.0 through 0.5.9 Description Improper validation of input quantity allows an unauthenticated remote client to significantly inflate the gas cost per payment for the fee-payer, reducing the sponsor's operating margin. When the...