TREE NEWS update: Ankr’s Ethereum bridge lost more than $303,000 in an exploit executed across five transactions. The bridge contract remained unpaused after withdrawals referencing a small Optimism deposit that had already been redeemed, allowing the attacker to drain funds. The incident adds to a growing list of cross-chain bridge vulnerabilities in 2025.
Ankr Ethereum Bridge Exploited for Over $303,000 in Five Transactions
The detail that stands out is not the size of the loss but the mechanism: a bridge contract left unpaused while withdrawals referenced an already-redeemed deposit. That points to state-validation and operational monitoring gaps rather than a novel cryptographic break, a recurring pattern in bridge incidents this year. The affected parties are users and liquidity providers exposed to Ankr's bridge, plus projects relying on it for cross-chain flows. Whether the contract pause and redemption checks are hardened across similar bridge designs is the open question worth watching.
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