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CryptoMedium•2 November 2026•
1 min read

Mercado Bitcoin Confirms Cyberattack Following $46M Outflow

Key Facts

1Mercado Bitcoin, Brazil's largest crypto exchange, confirmed a cyberattack following the detection of millions of dollars in outflows.
2Blockchain security firms reported over $46 million left the platform late Sunday night, though the company has not confirmed the specific figure.

Mercado Bitcoin, Brazil's largest cryptocurrency exchange, confirmed it suffered a cyberattack following the detection of millions of dollars in outflows. Blockchain security firms reported that over $46 million left the platform late Sunday night on November 1, 2026, though the company has not yet officially confirmed the specific figure.

Mercado Bitcoin stated via social media that the attack did not harm customers or result in a data breach, noting that its teams are investigating and tracking assets with authorities. However, reports from The Record indicated that security experts disputed this claim, citing blockchain evidence of funds siphoned from customer wallets, while other platforms have reportedly frozen approximately $6.5 million of the stolen assets.