Upbit issues caution advisory on L1 Flow after price drops sharply amid security concerns

Crypto exchange Upbit on Saturday issued a caution advisory for Flow (FLOW), the layer 1 blockchain developed by Dapper Labs, after the project flagged a potential security incident affecting its mainnet.

The Flow Foundation, along with its engineering teams and network partners, is investigating and addressing the issue, according to their latest update.

The Flow Foundation is currently investigating a potential security incident affecting the Flow network.

Our engineering teams are actively collaborating with network partners to mitigate the issue. We will provide further, verified updates as soon as they are available.

— Flow.com (@flow_blockchain) December 27, 2025

Upbit said the situation is under review and the exchange may take protective measures, including warnings, trading restrictions, or ending support if necessary. Users holding FLOW are urged to be cautious.

The announcement follows a sharp selloff in FLOW earlier today. The asset fell from more than $0.17 to about $0.1, its lowest level since launch, according to data from CoinGecko. FLOW once traded as high as $42 at its peak.

Meanwhile, the crypto market continues to struggle, with Bitcoin still unable to reclaim the $90,000 mark. Analysts remain cautious and see limited upside in the near term.