Patched vulnerability could’ve crippled ETH over the past 2 years: Ethereum Foundation
The Ethereum Foundation has come clean about a security vulnerability first spotted in 2019 that could have brought the mainnet to a halt until the Berlin upgrade last month.

https://cointelegraph.com/news/patched-vulnerability-could-ve-crippled-eth-over-the-past-2-years-ethereum-foundation?utm_source=thecryptoapp