[Standard] Cosmos Hub Mainnet - Network Upgrade gaia to v27.4.0

Scheduled for Jun 9, 09:00 - 15:00 UTC

Scheduled

The Cosmos Network is upgrading to gaia v27.4.0.
Voting concludes on June 9 at ~9 UTC, and the upgrade is expected to activate shortly after. A brief chain halt is expected at the upgrade height while validators coordinate the transition, during which RPC availability will be interrupted.
Normal service is expected to resume shortly after.

No user-facing RPC changes are included in this release.

https://github.com/cosmos/gaia/releases/tag/v27.4.0

Posted Jun 03, 2026 - 16:37 UTC

This scheduled maintenance affects: Cosmos (Cosmos Mainnet — REST API).