Digital Asset
Intelligence
Security Incident · Exchange

Mercado Bitcoin Signing Capability Compromise: $49.00M Reported Loss

·Source-attributed incident record

Incident Overview

Brazil’s largest crypto exchange Mercado Bitcoin suffered a security incident in the early hours of November 2, 2026. Attackers drained approximately $38 million from its multi-chain hot wallets and some deposit addresses. The platform quickly suspended deposits and withdrawals, stated that no customers were affected and no data was leaked, and will absorb the loss itself. About $11 million has been frozen.

Sources & References

Original incident referencehttps://x.com/MercadoBitcoin/status/2117417663966150718 (opens in a new tab)

This record presents information attributed to the linked sources. Incident dates describe the original event, not a new report. Reported loss figures reflect the source record and are not current market valuations.

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