# Sandwich Attack

> A specific MEV trade where a bot places one order before and one after your trade to extract value.

Canonical URL: https://fudfomo.co/glossary/sandwich-attack
Source: What The Block! Dictionary v1.0 (last updated 2026-04-25), browsable at https://wtb.fudfomo.co.

## Definition

A sandwich attack is a type of front-running. A bot spots a large pending swap, buys the same token first to push the price up, lets your trade go through at the inflated price, and then sells immediately after.

The bot pockets the difference and you get a worse fill than you would have. Tighter slippage settings, MEV-protection routers, and private mempools all help reduce the risk.

## Related terms

- [Front-Running](https://fudfomo.co/glossary/front-running): Profiting by placing your own transaction ahead of someone else's pending trade.
- [MEV](https://fudfomo.co/glossary/mev): Extra profit that validators or specialised bots can earn by reordering or inserting transactions in a block.
- [Slippage](https://fudfomo.co/glossary/slippage): The gap between the price you expected when you placed a trade and the price you actually got.
- [DEX](https://fudfomo.co/glossary/dex): A decentralised exchange. Trade crypto directly from your wallet, without an account.

## See the full catalogue

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