CoinWorld reports that, according to SlowMist, the Truebit protocol experienced a security vulnerability attack on January 8. The attacker exploited an integer overflow bug in its Purchase contract to mint $TRU tokens at nearly zero cost and stole 8,535 $ETH (approximately $26.44 million). The root cause of the incident was the lack of overflow protection in integer addition, leading to incorrect price calculations. The SlowMist team recommends that for contracts compiled with Solidity versions below 0.8.0, SafeMath library should always be used to protect all arithmetic operations to prevent overflow-related logical flaws.