Coinbase-backed Ethereum layer-2 network Base resumed operations after a roughly two-hour outage that halted block production and transaction processing. The team reported that an invalid block triggered the issue, and they continue to investigate the root cause. Node operators were advised to restart their nodes to restore synchronization. The first indication of trouble came at 16:03 UTC when block production was marked as unhealthy. By 16:52 UTC, the team had identified the problem and initiated remediation. The outage temporarily disrupted one of Ethereum's largest layer-2 networks. This marks the second such incident for Base, following a previous outage in August 2025. The team has not yet disclosed whether the invalid block resulted from a software bug or a consensus-related fault. They will continue to monitor network stability and provide updates as the investigation progresses.

Key facts

• Base network experienced a 2-hour outage due to an invalid block.
• The team advised node operators to restart their nodes to restore sync.
• This is the second outage for Base, following a previous one in August 2025.
• Root cause investigation is ongoing, and further updates will be provided.
• The incident temporarily halted transaction processing on the L2 network.

KeyAudit data perspective