The Sandbox Bridge Exploit Leads to Minting of Unbacked SAND Tokens

The Sandbox identified and contained a vulnerability in its SAND cross-chain bridge that allowed attackers to mint unbacked SAND tokens on Base and BNB Smart Chain. Blockaid reported approximately $49 billion in face-value SAND minted across over 400 transactions. The project claims the impact is less than 0.01% of the total SAND supply, with Ethereum and Polygon balances remaining unaffected. Bridging to Base and BSC has been disabled, isolating the compromised SAND. No user wallets were compromised, but South Korean exchanges Bithumb and Upbit suspended SAND deposits and withdrawals due to the incident. The Sandbox is preparing compensation for affected liquidity providers and conducting a post-mortem analysis. The incident highlights ongoing security risks associated with cross-chain bridges in the crypto space.

Key Points: • Attackers minted unbacked SAND tokens on Base and BSC, totaling approximately $49 billion. • The Sandbox disabled bridging to and from the affected networks, isolating the compromised tokens. • South Korean exchanges halted SAND transactions, citing user protection under local regulations.