Mercado Bitcoin Security Incident Note – 2 November 2026
🧐 Summary
🇧🇷 Mercado Bitcoin (Brazil’s largest cryptocurrency exchange) confirmed a security incident affecting one of its systems during the early hours of 2 November 2026. The incident was quickly contained. As a preventive measure, deposits and withdrawals have been temporarily suspended. Trading and other platform functions are not reported as fully halted in the initial statements.
👉 Official Exchange Statement
Mercado Bitcoin stated:
▶️ The incident was identified and contained rapidly.
▶️There was **no loss or prejudice to customer funds**.
▶️There was **no customer data leak**.
▶️ Teams are actively investigating, tracking assets on-chain, and coordinating with competent authorities.
▶️ Regular updates will be provided through official channels.
In a follow-up, the exchange publicly shared destination addresses linked to the related movements to assist community monitoring and recovery efforts (EVM, BTC, SOL, XLM, and TRON addresses published).
👉 On-Chain / Third-Party Statistical Analysis (Preliminary – Hypernative)
Blockchain security firm Hypernative flagged approximately US$40 million+(roughly R$215–217 million) in suspicious transfers from wallets associated with the exchange. These figures have not been confirmed by Mercado Bitcoin as the final loss amount and represent observed on-chain activity rather than verified customer-fund impact.
Key observed breakdowns (approximate, multi-source aggregation from Hypernative tracking):
-> Bitcoin: ~106 BTC
-> Ethereum: ~2,852 ETH
-> Solana: ~10,700 SOL
-> Stellar (XLM): ~6.7 million XLM
-> Avalanche (AVAX): ~77,000 AVAX
->Tron (TRX): ~1.7 million TRX
-> XDC: ~3.07 million XDC
-> Additional tokens: 200+ other assets
🛜 Network distribution: Activity spanned at least 10 blockchains, including Bitcoin, Ethereum, Solana, Tron, Polygon, Arbitrum, Avalanche, BNB Smart Chain (BSC), and Stellar. Major outflows concentrated in a short overnight window (reports cite activity starting around 02:15 UTC / late evening Sunday Brazil time, with peak transfers in the 06:19–06:53 UTC range).
🗝️ Key Distinctions & Context
▶️ Exchange position: Customer assets remain safe; incident appears limited to operational/hot wallet systems (cold storage not indicated as affected).
▶️ Third-party view: ~$40M in suspicious outflows is a preliminary on-chain estimate only.
▶️ Scale: Represents a significant but not exchange-threatening event relative to Mercado Bitcoin’s position as Brazil’s largest platform (multi-million user base). It forms part of a recent cluster of crypto security incidents.
▶️ Status as of latest updates: Investigation ongoing; deposit/withdrawal services remain paused pending secure restoration. Destination addresses released to support tracking.
📝 Notes for Users / Stakeholders
Monitor only official Mercado Bitcoin channels for status updates on service restoration. On-chain addresses shared by the exchange can be used for independent monitoring. Preliminary $40M figures should not be treated as confirmed customer losses. Self-custody of long-term holdings remains a standard risk-management practice across the industry.
This note compiles publicly available official statements and contemporaneous on-chain analysis reports as of 2 November 2026. Figures and details may be updated as the investigation progresses.
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