Bridge Hacks Cost $328.6M in May, PeckShield Data Shows

The mechanism is straightforward. A bridge holds a pool of locked collateral – often Ethereum (ETH) or stablecoins – and issues equivalent tokens on a destination chain. A successful exploit drains that pool, leaving wrapped tokens unbacked. Liquidity on the destination chain evaporates immediately, and users holding the wrapped version face de-pegging or frozen withdrawals.

PeckShield's data shows that bridge attacks are not slowing. May's eight incidents hit a range of protocols, though the report does not name the affected bridges. Without that transparency, users must rely on audit history, insurance fund size, and withdrawal delay mechanisms. The safest approach may be to limit bridge usage to established, battle-tested protocols with a track record of no major exploits.

The Next Decision for Cross-Chain Users

For traders moving assets between networks, the immediate question is which bridges remain trustworthy. The broader market implication is that cross-chain activity carries a premium for security risk. As long as bridges remain the primary method for moving assets between networks, the attack surface will stay large. Native swaps and centralized exchange cross-chain transfers offer alternatives, each with trade-offs in speed, cost, or custody.

The next decision point is whether the frequency of bridge attacks accelerates adoption of alternative interoperability solutions, such as atomic swaps or layer-zero protocols. If May's losses trigger a shift in user behavior, the bridge ecosystem may consolidate around fewer, more secure protocols. If not, the industry will continue to absorb hundreds of millions in losses per month.

For ongoing coverage of crypto security trends and market impact, see AlphaScala's crypto market analysis and the Ethereum (ETH) profile.