Optimism
2 incidents, 1 live. 28 days since the last new one.
2 drains in the last 12 months
2 drains in the last 12 months
1 drains in 2026
1 drains in 2025
Live
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Critical✓Contained
Bitget hot and warm wallets drained of $387.5M after zero-day in third-party security appliances
Attackers exploited a zero-day in two third-party security appliances at exchange Bitget, moved on to its production wallet job server and used a custom withdrawal tool to drain hot and warm wallets on 24-25 September 2026. The confirmed loss is about $387.5 million (first reported as $351.6M) across Ethereum, Arbitrum, Avalanche, Optimism, BSC, Base and the XRP Ledger. Bitget's CEO blamed North Korean hackers, and Bitget said cold wallets and private keys were not compromised. Hacken's Q3 figures say about $387M was covered by Bitget's user protection fund.
Bitget exchange hot and warm wallets·Ethereum, Arbitrum, Avalanche, Optimism, BNB Chain, Base·$388M stolen·Since Sep 24, 2026·
Past
November 2025 1
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Critical✓Contained
Aerodrome and Velodrome front-ends hijacked via DNS, cloned sites serve Eleven Drainer
On 21 November 2025 an attacker changed the DNS records for aerodrome.finance and velodrome.finance, sending visitors to a cloned front-end running 'Eleven Drainer' code. Users who signed on the fake site lost tokens: Blockaid tied about $700K to nine attacker addresses, and Halborn put losses above $1M. The smart contracts were not touched. Anyone who signed on either site that evening should revoke approvals they don't recognise.
Aerodrome (Base) and Velodrome (Optimism) web app users·Base, Optimism·$700K stolen·Since Nov 21, 2025·
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