[Urgent] Cosmos - Mainnet - Upgrade to v27.6.0

Scheduled for Aug 4, 09:00 - 13:00 UTC

Scheduled

Cosmos Mainnet is undergoing a Network upgrade to Gaia v27.6.0.

This release increases the maximum CosmWasm contract size from 800 KiB to 1.6 MiB and allowlists additional gRPC queries for CosmWasm contract access, enabling broader contract functionality.

During the maintenance window, brief interruptions to RPC availability may occur.

RPC Changes:
/cosmos.gov.v1.Query/Proposal — Now allowlisted for CosmWasm contract queries.
/cosmos.staking.v1beta1.Query/Validator — Now allowlisted for CosmWasm contract queries.

https://github.com/cosmos/gaia/releases/tag/v27.6.0

Posted Jul 29, 2026 - 14:16 UTC

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