Truebit acknowledged the hack and urged users not to interact with the vulnerable smart contract.
Truebit exploited for over $26 million
A bug in a smart contract belonging to the Ethereum-based Truebit project allowed an attacker to steal 8,535 ETH (~$26.4 million). The thief targeted one of the project's older contracts — deployed in 2021 — which contained a bug in which the price calculation to mint sufficiently large quantities of the protocol's TRU token would overflow, erroneously allowing people to mint large amounts of TRU for next to nothing. The exploiter took advantage of this by minting TRU and swapping it for ETH, ultimately causing the TRU token price to crash 99.9%. Another subsequent attack saw around $300,000 more drained from the project.