Base Mainnet Halts Block Production @base mainnet went down on June 25, 2026, after @coinbase's Ethereum layer-2 stopped producing blocks over what it described as an "unsafe head stall." The
@base mainnet went down on June 25, 2026, after @coinbase's Ethereum layer-2 stopped producing blocks over what it described as an "unsafe head stall." The freeze halted deposits and withdrawals on the network while engineers investigated the root cause.
Base traced the problem to a single faulty block that interfered with subsequent block building. Multiple remediation threads were opened in response. No restart timeline was provided at the time of the initial disclosure.
The Base status page listed the incident as unresolved, while third-party monitoring service StatusGator logged it as a "Down" severity event with confirmed issues across mainnet withdrawals, mainnet deposits, and client software. According to the Coinbase status page, "some users may experience delays in transactions on Base network due to a Base network outage related to block production."
Coinbase confirmed that buys, sells, and fiat withdrawals and deposits were not affected, and that user funds remained safe throughout the incident.
This is not the first time Base has faced a block production failure. In August 2025, the network confirmed a 33-minute outage after the active sequencer fell behind under high on-chain activity, triggering an automated handoff to a sequencer that was still being provisioned. That incident stalled the chain at block 33,792,704. The June 25 event marks a recurrence of sequencer-level fragility on one of Ethereum's most widely used layer-2 networks.
Engineers were actively working to resolve the issue at the time of writing, with no estimated time for full restoration.
Sources:Base Official Status PageCoinbase Status PageBitcoin.com: Base Incident Report Reveals Infrastructure Weakness Behind Outage
