Bisq Protocol Suffers 11 BTC Exploit: Compensation Plan Underway

The decentralized cryptocurrency exchange Bisq has confirmed a security breach resulting in the theft of approximately 11 Bitcoin (BTC). The incident, which primarily targeted altcoin-to-BTC transactions, occurred due to a technical flaw in the protocol's transaction verification logic. According to official statements from the development team, the exploit was identified as a negative miner fee vulnerability, allowing an attacker to divert funds during the multi-signature process required for peer-to-peer trades.

Mechanism of the Exploit and Immediate Response

The attacker successfully exploited a lack of verification mechanisms within the Bisq protocol. By manipulating transaction parameters, specifically utilizing a negative miner fee vulnerability, the perpetrator was able to redirect funds to their own wallet addresses through multi-signature transactions. The breach specifically impacted users trading various altcoins for Bitcoin. In response, the Bisq development team has already implemented a fix and is preparing a mandatory patch update for all users.

• The vulnerability allowed the bypass of standard trade security protocols.
• Affected assets total roughly 11 BTC, valued at current market rates.
• The core development team is conducting a comprehensive security audit of the codebase.
• The focus of future updates will remain on wallet security and transaction integrity.

Compensation Proposals and DAO Governance

To address the losses incurred by users, the Bisq community is currently discussing a formal compensation plan. Under the proposed framework, victims will have the option to receive reimbursement in either Bitcoin or BSQ tokens, the native utility token of the Bisq decentralized autonomous organization. However, the implementation of any repayment scheme is subject to a DAO vote, consistent with the project's decentralized governance model.

Victims can choose compensation in Bitcoin or BSQ tokens, but this will be implemented after a DAO vote and is expected to be determined after the DAO cycle ends on May 25th.

The protocol representatives emphasized that while the incident is serious, the situation remains controllable. Users are currently advised to temporarily reduce the amount of BTC held within their integrated Bisq wallets until the security patch is fully deployed and verified.

While the loss of 11 BTC marks a significant event for the peer-to-peer platform, Bisq officials view the incident as a critical security warning for the broader decentralized finance (DeFi) ecosystem. The final decision regarding the distribution of funds is expected shortly after May 25, 2026, following the conclusion of the current DAO voting cycle. Moving forward, the project aims to strengthen its code review processes to prevent similar vulnerabilities from affecting decentralized multi-signature wallets.