Nubank and Mercado Pago Restrict Crypto Operations After Vendor Instabilities

Overview

• Nubank and Mercado Pago limited specific crypto actions on Friday, blocking NuCripto deposits and withdrawals at Nubank and preventing some transfers to external wallets at Mercado Pago.
• Both companies said the interruptions came from instabilities at third‑party suppliers and emphasized that customer assets and account data remained protected during the outages.
• Chainalysis confirmed a separate early‑November breach that led it to suspend KYT transaction‑monitoring tools and has begun phased restorations that require clients to take extra security steps.
• Fireblocks publicly denied any role in Nubank’s outage, and neither fintech has named the affected vendors or given a firm timeline for full normalization.
• The episode highlights how heavy reliance on external data and AML/risk providers can force preventive service blocks that disrupt customers’ ability to move crypto and could increase scrutiny of vendor safeguards.