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Base Network Stalls After Invalid Block Freezes Sequencer

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Coinbase’s Base mainnet went down for nearly two hours Thursday after a faulty block froze the chain’s sequencer and halted all new block production.

Key facts

Summary

Base mainnet block production stalled for nearly 2 hours on June 25 after block #47,806,542 caused a consensus failure. Coinbase’s Base team confirmed all funds are safe, with sequencing restored by 17:51 UTC and monitoring ongoing. Base’s Beryl hard fork, introducing the B20 native token standard, remains on schedule for its 18:00 UTC activation window. The incident began at 16:03 UTC on June 25, 2026, when Base engineers detected unhealthy block production on the network’s mainnet.

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