The Sandbox Confirms SAND Cross-Chain Bridge Vulnerability Affecting Base and BSC

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The Sandbox confirmed a vulnerability in its SAND cross-chain bridge via on-chain news, affecting the Base and BSC networks. The issue permitted unauthorized minting of uncollateralized tokens, impacting less than 0.01% of the total supply. Cross-chain transfers on Base and BSC are now suspended, with affected tokens isolated and non-transferable. A snapshot has been taken, and a compensation plan for liquidity pool users is underway. The project will release a full report. This incident is classified as vulnerability news.

According to Huoxing Finance, on August 22, The Sandbox officially confirmed that its team has identified and fully regained control over the recent vulnerability exploit affecting the SAND cross-chain bridge on the Base and BNB Smart Chain (BSC) networks. The official statement noted that the incident had a limited impact, involving less than 0.01% of the total SAND supply. SAND tokens on Ethereum and Polygon remain unaffected, user wallets were not compromised, and holders or liquidity providers on those networks need take no action. It was disclosed that attackers exploited the vulnerability to mint unbacked SAND tokens on Base and BSC. The Sandbox has since disabled SAND cross-chain functionality on both networks, and SAND tokens on Base and BSC have been isolated and are currently non-transferable or exchangeable. The Sandbox advises users not to buy, sell, or trade SAND on Base or BSC, as liquidity on these networks has been impacted. The team has completed a pre-incident snapshot and is developing a compensation plan for affected liquidity pool (LP) users, while continuing to investigate the full scope of the vulnerability. A comprehensive incident report and technical post-mortem will be released in due course.

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