Orbit Chain Bridge Compromise, December 2023: What Happened & What to Check
Roughly $81.5m left Orbit Bridge on New Year's Eve 2023 in transactions that carried valid signatures.
Bridge exploit
Multichain Unauthorised Outflows, July 2023: What Happened & What to Check
Assets left Multichain bridge contracts with no exploit visible on-chain, amid the reported detention of the project's chief executive.
Nomad Bridge Replay Exploit, August 2022: What Happened & What to Check
A routine upgrade left Nomad accepting any message as proven. Hundreds of addresses copied the same transaction and drained the bridge in…
Harmony Horizon Bridge Key Compromise, June 2022: What Happened & What to Check
Compromise of two of five multi-signature keys was enough to authorise withdrawals from Harmony's Horizon bridge, taking roughly $100m.
Ronin Bridge Validator Key Compromise, March 2022: What Happened & What to Check
Attackers obtained enough Ronin validator signatures to forge withdrawals, draining 173,600 ETH and 25.5m USDC. The theft went unnoticed for six days.
Wormhole Signature Verification Exploit, February 2022: What Happened & What to Check
A flaw in Wormhole's Solana signature verification let an attacker mint 120,000 wETH without depositing collateral. Jump Crypto replaced the shortfall.
Poly Network Cross-Chain Exploit, August 2021: What Happened & What to Check
An attacker exploited Poly Network's cross-chain contract to reassign the keeper role, taking roughly $611m — then returned substantially all of it.