The exchange stopped deposits and withdrawals after an attack reached hot wallets; independent tracing indicates the signing exposure extended to thousands of customer deposit addresses.
What changed
Mercado Bitcoin confirmed a security incident on 2 November and suspended deposits and withdrawals. Bloomberg Línea reported an estimated US$40 million hot-wallet loss. The exchange stopped deposits and withdrawals after an attack reached hot wallets; independent tracing indicates the signing exposure extended to thousands of customer deposit addresses.
Public record through 2026-11-03. Source references count citations across published briefings, including repeated sources. Explore the record and its limits →
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Values are US$ millions at Bitquery's 15:46 UTC observation point on 2 November 2026; later movements and freezes may alter the balance. Total moved: 48.5. Frozen by Tether and Paxos: 7.3. Not frozen at observation point: 41.2. Focus the chart and use the up and down arrow keys for detail. Source: Bitquery Research; Security.io calculated the not-frozen balance by subtracting US$7.3 million from US$48.5 million.