Zenhive Machine Payments Protocol vulnerabilities

• zenhive mpp, machine payments protocol +1 more On-chain transfer proof is not single-use in mpp EVM payment method, enabling cross-challenge replay CVE-2026-67581 Fix available 8.7 HighAugust 19, 2026
• zenhive mpp, machine payments protocol +1 more Tempo fee sponsorship in mpp bounds each transaction but not aggregate exposure, allowing concurrent sponsor-wallet drain CVE-2026-73541 Fix available 8.3 HighAugust 19, 2026
• zenhive mpp, machine payments protocol +1 more Static memo configuration in mpp Tempo disables per-challenge attribution binding, enabling third-party replay CVE-2026-73136 Fix available 8.2 HighAugust 19, 2026
• zenhive mpp, machine payments protocol +1 more Non-atomic hash-credential dedup in mpp Tempo allows replay of a confirmed payment under a concurrent race CVE-2026-73829 Fix available 6.3 MediumAugust 19, 2026