# How to steal $1M from a DeFi Smart Contract - Bartosz Barwikowski

- Speakers: [Bartosz Barwikowski](https://streameth.org/speakers/bartosz-barwikowski)
- Channel: [ETH Warsaw](https://streameth.org/eth-warsaw)
- Date: 2025-10-07
- Duration: 29:47
- Watch: https://streameth.org/watch/yt-ZyKTo6jW2dY
- YouTube: https://www.youtube.com/watch?v=ZyKTo6jW2dY

## Description

In May 2024, I discovered a critical flaw in a DeFi smart contract that could have been exploited to steal $1.08 million. I will recount the story of how I uncovered the vulnerability and demonstrate the simulation I created to prove the bug. Additionally, I will explain how the issue was resolved and discuss strategies to prevent similar vulnerabilities in other projects.


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