BNB Chain lost 2 million BNB coins worth $568 million in a cross-bridge exploit last week. The incident is yet another on the list of major DeFi attacks that have occurred through 2021-22, resulting in a loss of over $2 billion.
While the recent attack is reported to be due to a flaw in message verification by the validators, Blockchain security infrastructure firm BlockSec highlighted that crypto and DeFi bridges have historically been sought-after targets by attackers.
Source: https://beincrypto.com/top-11-defi-cross-chain-bridge-attacks-of-2022-hackers-bag-over-2-billion/