Flow Blockchain Responds to $3.9M Exploit Incident, User Assets Secure
Written by Ohris M. Greyoon, Blockchain & Crypto Expert
Source: Coinmarketcap
Updated: Dec 29 2025- Incident Overview: On December 27, 2025, an attacker exploited a vulnerability in Flow's execution layer, moving approximately $3.9 million in assets off-network before validators coordinated a halt, indicating partial resilience of the system as existing user balances remained unaffected.
- Security Response Measures: The Flow Foundation has closely collaborated with exchanges, bridge operators, and forensic teams to map the exit path of the funds and submitted freeze requests to prevent further unauthorized transfers, ensuring the security of user assets.
- Network Repair Progress: Validators have developed and deployed a network fix called Mainnet 28, restoring the ledger to a state prior to the exploit, requiring users to resubmit transactions within a specific timeframe, which reflects a commitment to user experience.
- Ecosystem Coordination: This incident highlights the interconnectedness of blockchain networks, with the Flow team working to synchronize with ecosystem partners to ensure ledger consistency when resuming normal transactions, thereby avoiding potential system instability.
About the author
Ohris M. Greyoon
Ohris M. Greyoon holds a Master’s in Computer Science from MIT and has 10 years of experience in blockchain technology and cryptocurrency markets. A pioneer in decentralized finance (DeFi) analysis, he leads Intellectia’s Crypto News, offering cutting-edge insights into digital assets.
