Single Transaction Attack

Definition ∞ A single transaction attack refers to a malicious exploit that can be executed entirely within the scope of a single blockchain transaction. This type of attack often leverages vulnerabilities in smart contract logic, such as re-entrancy or flash loan manipulations, to achieve an illicit gain or disrupt protocol operations. Because it occurs within one atomic operation, it can be difficult to detect and prevent in real-time. Such attacks highlight the importance of rigorous smart contract auditing.
Context ∞ Crypto news frequently covers single transaction attacks, particularly in the decentralized finance (DeFi) sector, where flash loans have enabled new vectors for these exploits. Reports often detail how attackers manipulate oracle prices or exploit contract flaws to drain liquidity pools or steal assets. The ongoing discussion among developers and security researchers focuses on designing more robust smart contracts and implementing defensive coding practices to counteract these rapid and often devastating attacks.

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→Asset Recovery Operation

→Arithmetic Flaw

→Liquidity Pool Exploit

Yearn Finance Legacy Contract Exploited by Infinite Token Minting Flaw

Unchecked arithmetic in a legacy yETH contract allowed an attacker to mint infinite tokens, creating a systemic risk for all dependent liquidity pools.

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→yETH Token

→Economic Exploit

→Contract State Manipulation

Yearn Finance Legacy Pool Drained Exploiting Infinite Token Minting Logic Flaw

A critical logic flaw in a custom stableswap contract allowed an attacker to mint unbacked yETH, leading to an immediate $9 million liquidity drain.

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→Token Economics Failure

→On-Chain Forensics

→Financial System Integrity

Yearn Legacy Token Exploit Drains Nine Million Dollars via Infinite Minting Flaw

A critical logic flaw in the legacy yETH stableswap contract enabled an infinite token mint, directly compromising $9M in liquidity.

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→Lending Protocol Exploit

→DeFi Risk

→Protocol Insolvency

Abracadabra Lending Protocol Exploited via Single Transaction State Manipulation

A critical contract flaw allowed a single-block exploit to bypass collateral checks, creating a systemic risk for lending protocols.

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→Market Manipulation

→Community Vault

→Decentralized Exchange

Perpetual DEX Suffers $4.9 Million Loss from Leverage and Price Manipulation

A systemic design flaw permitting extreme leverage on low-liquidity assets enabled an attacker to inflict a $4.9M loss via calculated market manipulation.