Kraken cryptocurrency exchange suffered a loss of $3 million as a result of a bug in its security system being exploited by malicious "security researchers". Security Chief Nick Percoco stated that ethical standards were violated. 🕵️‍♂️ This bug allowed customers to add credit to their accounts before their assets were confirmed. Kraken admitted that it did not test for the bug before the attack. After the error was fixed, it was discovered that three more accounts were using the same error within a few days. Kraken demanded the return of the stolen funds, but the individuals refused.