BitMart security breach: $391,000 in transfers may link to Brazilian exchange hack

A BitMart security breach on November 2, 2026, involved a relatively small amount of funds, founder Sheldon Xia said, as preliminary findings pointed to a possible link with the Mercado Bitcoin hack. The incident hit an exchange already dealing with suspended trading, unresolved customer withdrawals and a severely understaffed security team. Key takeaways Bitquery traced approximately $391,000 drained from wallets mostly linked to BitMart. Xia described staffing shortages following restructuring and employee disputes. Mercado Bitcoin reported about $38 million involved and around $11 million blocked. BitMart’s restructuring proposal cites approximately $319.5 million lost in December 2021. BitMart security breach investigation points to shared addresses BitMart’s initial investigation suggests the group behind the Mercado Bitcoin attack also targeted its wallets, Xia said in a November 3 statement on X.

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