A forged cross-chain message bypassed state proof validation on the bridge contract, granting admin control over the bridged DOT token and allowing the attacker to mint and dump the entire supply for $237,000. An attacker exploited a vulnerability in Hyperbridge's Ethereum gateway contract to mint 1 billion bridged Polkadot tokens and dump them for about $237,000 in ether. The exploit, which did not affect Polkadot's core network or native DOT, abused a flawed cross-chain message vali…
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