Base completed the scheduled Cobalt upgrade to Base Mainnet, which began at 18:00 UTC and finished at 20:00 UTC on September 30th. No further action is needed; node operators should be running v1.4.2 or greater. Upstream incident: https://base-l2.statuspage.io/incidents/zctq4rtnmlxd
Posted Sep 30, 2026 - 20:13 UTC
Monitoring
The scheduled Base Cobalt upgrade on Mainnet began at 18:00 UTC on September 30th and is now in progress. Node operators running Base Mainnet must be on v1.4.2 or later of the base/base software; we are monitoring the rollout and will confirm once it completes. Upstream incident: https://base-l2.statuspage.io/incidents/zctq4rtnmlxd
Posted Sep 30, 2026 - 18:14 UTC
Investigating
Base has scheduled the Cobalt upgrade for Base Mainnet on September 30th, 18:00-20:00 UTC. Mainnet node operators must upgrade to base/base v1.4.2 or later before the window; no impact to services is expected outside the maintenance window. Upstream incident: https://base-l2.statuspage.io/incidents/zctq4rtnmlxd