Blockchain security firm PeckShield reported an active exploit targeting Balancer and its protocol forks on November 3, resulting in losses exceeding $128 million. Ethereum sustained approximately $100 million in losses, followed by Berachain with $12.9 million. Balancer's total value locked fell 46% from $770 million to $422 million as the breach exposed vulnerabilities in the protocol's batch swap price calculation logic.

Balancer, a decentralized liquidity protocol, lost approximately $129 million in a security breach affecting Ethereum, Base, Optimism, Polygon, Sonic, and Berachain. Attackers exploited vulnerabilities in V2 vault infrastructure to drain liquid staking tokens. The protocol confirmed it is investigating the incident with its engineering and security teams.

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Decentralized exchange protocol Balancer lost $128 million on November 3, 2025, in an exploit spanning six blockchain networks. The attack targeted an access control vulnerability in Balancer V2's smart contracts, with Ethereum accounting for $99 million of total losses. The incident prompted Berachain validators to execute an emergency network halt and hard fork.

Decentralized finance protocol Balancer lost more than $128 million in a security breach on Monday. Security firms Peckshield and Cyvers detected the incident after observing large on-chain transfers, including 6,587 WETH ($24.5 million), 6,851 osETH ($26.9 million), and 4,260 wstETH ($19.3 million). Balancer confirmed awareness of the exploit affecting its v2 tools and stated its engineering team is investigating.

Balancer suffered a security breach on November 3, 2025, resulting in approximately $116 million in losses across Ethereum, Arbitrum, Base, and Optimism networks. The attack exploited smart contract vulnerabilities to drain wrapped ETH from the decentralized exchange protocol. Ethereum's mainnet accounted for $91 million of the total losses, with the attacker's wallet identified holding multiple versions of unwrapped stolen assets.

Ethereum-based decentralized exchange Balancer experienced unauthorized withdrawals of approximately $88 million across multiple blockchain networks, according to blockchain security firm PeckShield. Onchain data shows large transfers of wrapped ether and liquid staking derivatives from protocol vaults to external addresses. The protocol's native governance token BAL declined more than 4% following the incident.

The European Commission will present a proposal in December to establish a single regulatory authority overseeing cryptocurrency exchanges, stock markets, and clearing houses, similar to the U.S. Securities and Exchange Commission. The initiative aims to reduce fragmentation across national supervisors and streamline cross-border operations for financial firms across member states. One option under consideration involves expanding the European Securities and Markets Authority's mandate to cover major cross-border financial entities.