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Balancer V2 Hack: Over $110 Million in Assets Drained

Tuesday Nov 4 2025 02:10

2 min

Table of Contents

1. Balancer V2 Hack Overview
1.1 Loss Specifics
1.2 Cause of the Exploit
1.3 Balancer and Community Response
1.4 What Users Should Do
1.5 Next Steps

Balancer V2 Hack Overview

The recent exploit of the Balancer V2 DeFi protocol marks a significant blow to the decentralized finance community. A smart contract vulnerability resulted in a staggering loss of over $110 million in assets. This comprehensive analysis explores the specifics of the hack, including the assets affected, the reactions from key industry players, and the steps users can take to protect themselves.

Loss Specifics

As of this writing, the funds stolen from Balancer have surpassed $116 million. The primary assets stolen include WETH, wstETH, osETH, frxETH, rsETH, and rETH. These assets were distributed across several blockchains, including:

Ethereum: Approximately $100 million
Arbitrum: Approximately $8 million
Base: Approximately $3.95 million
Sonic: Over $3.4 million
Optimism: Approximately $1.57 million
Polygon: Approximately $230,000

Cause of the Exploit

Initial investigations suggest the attack targeted Balancer's V2 Vault and liquidity pools, exploiting a vulnerability in smart contract interactions. A maliciously deployed contract allowed for manipulation of Vault calls during liquidity pool initialization. Improper handling of authorizations and callbacks enabled attackers to bypass protection measures, leading to unauthorized swaps or balance manipulation between interconnected liquidity pools. Current information indicates this was a pure smart contract exploit, with no evidence of private key compromise.

Balancer and Community Response

The Balancer team has officially acknowledged the potential vulnerability affecting Balancer v2 pools. An investigation is being prioritized by engineering and security teams. Berachain, potentially affected, also responded swiftly by proactively pausing the public chain operation to prevent further impact on BEX (primarily the USDe tri-pool).

What Users Should Do

Balancer users should take the following actions to protect themselves:

Withdraw funds from Balancer v2 pools to minimize potential losses.
Revoke authorizations using tools like Revoke, DeBank, or Etherscan to revoke smart contract permissions for the Balancer address.
Closely monitor the attackers' future actions and their potential consequences for other DeFi protocols.

Next Steps

Odaily Planet Daily is monitoring Balancer's efforts to pinpoint the precise contract vulnerability and the possibility of recovering the stolen assets or providing alternative solutions. Updates will be provided in a timely manner as the situation evolves.

Risk Warning: This article is provided for informational purposes only and does not constitute investment advice, investment research, or a recommendation to trade. The views expressed are those of the author and do not necessarily reflect the position of Markets.com. When considering shares, indices, forex (foreign exchange), and commodities for trading and price predictions, remember that trading CFDs involves a significant degree of risk and may not be suitable for all investors. Leveraged products can result in capital loss. Past performance is not indicative of future results. Before trading, ensure you fully understand the risks involved and consider your investment objectives and level of experience. Cryptocurrency CFD trading restrictions may apply depending on jurisdiction.

Written by:

Sophia Claire

Balancer V2 Hack: Over $110 Million in Assets Drained

Balancer V2 Hack Overview

Loss Specifics

Cause of the Exploit

Balancer and Community Response

What Users Should Do

Next Steps

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