Foom Cash exploit drains $2.26M as white hat helps recover $1.84M on Base and Ethereum

Foom Cash, a decentralized lottery protocol using zero-knowledge proofs, suffered a $2.26 million exploit linked to a Groth16 verifier deployment error. A white hat identified the vulnerability and helped secure and return $1.84 million, with the protocol later paying a $320,000 bounty and $100,000 security fee. The incident highlights the expanding role of ethical hackers in defending Web3 projects against cross-chain attacks.