Hit by Multisignature Scripting Error Resulting in $1.4 Million Loss

DeFi Protocol Yearn Addresses Security Measures Post Treasury Drainage

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Key Takeaways:

  •’s treasury lost $1.4 million due to a multisignature scripting error.
  • The loss occurred during the conversion of tokens to stablecoins on CowSwap.
  • Yearn’s liquidity pool value plummeted by 63% following the incident.
  • Yearn is appealing to arbitrage traders to return some of the lost funds.
  • The protocol is taking steps to improve security and prevent future errors., a notable player in the decentralized finance (DeFi) space, recently faced a significant setback when a multisignature scripting error led to a substantial loss from its treasury.

An incorrect script caused the entire balance of 3,794,894 lp-yCRVv2 tokens to be swapped, resulting in a financial blow to the protocol.

lp-yCRVv2 tokens are a type of tokens that represent liquidity provider (LP) shares in the yCRVv2 pool. The yCRVv2 pool is a decentralized finance (DeFi) pool that allows users to provide liquidity by depositing their yCRV tokens.

Incident Breakdown

The error transpired during an operation to convert yVault LP-yCurve tokens into stablecoins using the CowSwap platform.

This misstep led to’s treasury losing roughly $1.4 million. The trade ended with Yearn receiving 779,958 DAI yVault tokens, which was a staggering 63% less than the lp-yCRVv2’s spot price at the time, indicating a significant slippage in the protocol’s liquidity pool value.

No Impact on Customer Funds

It’s important to note that the funds lost were strictly from Yearn’s protocol-owned liquidity.

Customer funds remained unaffected by this incident. Despite the setback, has confirmed the $1.4 million figure of the loss and is actively taking steps to recover the funds.

Recovery Efforts and Community Response is hopeful that some of the arbitrage traders who may have benefited from the slippage will return the funds.

The protocol has reached out, including writing on-chain messages, urging those who profited to send back a fair amount.

One trader has already responded positively by returning 2 Ether, valued at approximately $4,500, to Yearn’s treasury address.

Arbitrage traders are individuals or entities that engage in the practice of arbitrage. Arbitrage is the simultaneous buying and selling of securities, commodities, or currencies in different markets to take advantage of price discrepancies. Arbitrage traders aim to profit from these price discrepancies by buying low in one market and selling high in another.

Enhancing Security Post-Incident

This is not the first time has been targeted.

The DeFi protocol previously suffered an $11.6 million exploit. In response to these incidents, Yearn is planning to introduce new security measures, including specific manager contracts for protocol-owned liquidity, human-readable output messages, and stricter price impact thresholds to mitigate the risk of similar mistakes.

Looking Ahead is committing to improving its risk management and security protocols. The recent events have spurred the protocol to take definitive action to bolster its defenses, ensuring a more secure and reliable DeFi platform for its users.

The community and industry observers are watching closely as Yearn aims to regain trust and stabilize its operations following these challenges. is facing a tough situation but is determined to overcome it through enhanced security measures and community support.

The protocol continues to emphasize the importance of security in the DeFi sector and is working hard to protect its funds and reputation.


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