The Sandbox contained a vulnerability in its SAND cross-chain bridge on Base and BNB Smart Chain after an attacker minted unbacked tokens on both networks. The impact is estimated at under 0.01% of the total SAND supply, with no user wallets compromised. Tokens on Ethereum and Polygon remain unaffected. The platform disabled bridging to and from Base and BSC, isolating the minted SAND which cannot be moved or redeemed. Korean exchanges Bithumb and Upbit suspended SAND deposits and withdrawals as a precaution.
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