The Base chain experienced two outages over the weekend, totaling 136 minutes. The root cause was a vulnerability in sequencer state cleanup—old states remained after executing invalid transactions, preventing nodes from producing blocks. A patch was deployed, but a second interruption occurred due to a race condition.

This is not the first time Base has gone down due to sequencer failures. Similar incidents were recorded in September 2024 and August 2025. As the second-largest Ethereum L2 by TVS, its reliability assumptions are being repeatedly tested.

The core issue lies in the L2 architecture’s reliance on a single point of failure: the sequencer. The sequencer is the “heart” of an L2—when it fails, the entire network halts. Currently, most L2s still depend on centralized sequencers, with decentralization progressing slowly.

Base’s outages serve as a reminder to the market: when funds and contracts heavily depend on L2s, the cost of failure is no longer “a few minutes of downtime.” Users must re-evaluate L2 security assumptions, especially networks that carry large amounts of DeFi and bridged assets.

Coinbase has since pledged to enhance fuzz testing and recovery mechanisms. But structural risks will not disappear with a single patch. As the L2 sector pursues TVL and user numbers, reliability must be given higher priority.

$eth #defi #layer2 #链上数据 #blockchain
#eth #crypto market #币圈 #web3 #HashChainNews