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  1. Home
  2. /Glossary
  3. /Approval Exploit
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defi

Approval Exploit

An attack that abuses the token approval mechanism.

Definition

An attack that abuses the token approval mechanism. When you approve a DeFi contract to spend your tokens, a malicious or compromised contract can drain your entire approved balance. This is why infinite approvals are dangerous and why you should regularly revoke unused token approvals.

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Related Terms

Infinite Approval

When you approve a smart contract to spend unlimited amounts of a token from your wallet.

Smart Contract

Self-executing code stored on a blockchain that runs when conditions are met.

Phishing

A social engineering attack where scammers create fake websites, emails, or messages that look legitimate to steal your credentials or trick you into signing malicious transactions.

1inch

A DEX aggregator that splits trades across multiple decentralized exchanges to find the best overall price.

Aave

One of the biggest lending and borrowing protocols in DeFi.

Across Protocol

A cross-chain bridge that uses an optimistic verification system and a network of relayers to move tokens between chains quickly.

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