Across Protocol Loses Less Than $4 Million in Solana Relayer Attack
Across Protocol suffered a significant loss due to an attack on its Solana relayer. According to the post-incident report, the attacker fabricated $41.7 million in Solana deposit events, targeting 18 chains and causing the risk lab-operated relayer to lose less than $4 million.
The attack occurred between 05:07 and 06:14 UTC on July 17, with the attacker using 1,627 single-use Solana wallets to create fake deposit events. The funds were directed towards one recipient address on an Ethereum Virtual Machine-compatible network.
Risk Labs' relayer paid $4.5 million across 581 fraudulent requests before Across stopped Solana operations. However, the protocol was able to invalidate the remaining 1,046 requests, preventing about $37 million in additional payouts.