Base, Coinbase’s Ethereum Layer-2 network, went dark on June 25, 2026, when block production ground to a halt for more than an hour. The culprit was a consensus issue triggered by an invalid block sequence following block number 47,806,542.
Jesse Pollak, the lead builder for Base, publicly acknowledged the disruption and directed users to the official status page as the team worked through its investigation. His message was clear on one point: no user funds were at risk.
The Base team isolated the problem and restored the sequencer, bringing the network back online.
What actually broke
The invalid block sequence created a consensus failure, meaning the network couldn’t agree on the next valid state of the chain. The sequencer stalled, block production stopped, and users couldn’t get transactions processed.
