Cross-chain bridge vulnerability confirmed! Attackers mint tokens for arbitrage, and DOT was temporarily "created out of thin air." Further details of the Hyperbridge security incident reveal: its Handler V1 contract on Ethereum has a Merkle Mountain Range (MMR) proof replay vulnerability, ultimately causing a loss of approximately $242k. The core issue is that proofs and requests are not bound together. Attackers can reuse historical valid proofs, combined with forged new requests, to bypass verification mechanisms. Specific attack methods include: tampering with DOT Token administrator permissions to "mint" DOT and sell for profit (about $237.4k); using the same method to attack ARGN Token (loss of about $3,800); and ultimately withdrawing funds. Earlier, there was an extreme case where DOT on Ethereum was abnormally minted up to 1 billion tokens, triggering market panic. This vulnerability was discovered by security firm Phalcon Security and analyzed using on-chain tools.