Malicious Relayer Can Replay Execute Calldata On Different Chains Causing Double-Spend Issue

Lines of code Vulnerability details Proof-of-Concept This issue is only applicable for fast-transfer. Slow transfer would not have this issue because of the built-in fraud-proof mechanism in Nomad. First, the attacker will attempt to use Connext to send 1000 USDC from Ethereum domain to Optimism...