> ## Documentation Index
> Fetch the complete documentation index at: https://cosmos-docs-sync-security-docs.mintlify.site/llms.txt
> Use this file to discover all available pages before exploring further.

# Changelog

> Release history and changelog for Cosmos IBC

<Info>
  This page tracks releases and changes for v11.0.0. For the full release history, see the [CHANGELOG](https://github.com/cosmos/ibc-go/blob/main/CHANGELOG.md) on GitHub.
</Info>

<Update label="Release" description="v11.0.0" tags={["IBC", "Release"]}>
  ## Features

  * [#8573](https://github.com/cosmos/ibc-go/pull/8573) Support custom address codecs in transfer, PFM, and rate limiting.
  * [#8285](https://github.com/cosmos/ibc-go/pull/8285) Packet forward middleware.
  * [#8545](https://github.com/cosmos/ibc-go/pull/8545) Support sending multiple payloads in the same packet for atomic payload execution.
  * [#8473](https://github.com/cosmos/ibc-go/pull/8473) Support sending v2 packets on v1 channel identifiers using aliasing.

  ## Improvements

  * [#8734](https://github.com/cosmos/ibc-go/pull/8734) Add extra validation for ProtoJSON unmarshalling in ICS-27 ICA.
  * [#8774](https://github.com/cosmos/ibc-go/pull/8774) Add length validation to `MsgCreateClient` and `CounterpartyMerklePrefix`.

  ## Dependencies

  * [#8451](https://github.com/cosmos/ibc-go/pull/8451) Bump **go** to **1.24**
  * (light-clients/08-wasm)[#8500](https://github.com/cosmos/ibc-go/pull/8500) Bump **github.com/prysmaticlabs/prysm/v5** to **github.com/OffchainLabs/prysm/v6\@v6.0.4**

  ## API Breaking

  * [#8820](https://github.com/cosmos/ibc-go/pull/8820) Bump ibc-go to v11 and use `sdk.ValidateAuthority` in msg\_server handlers.
  * (apps) [#8476](https://github.com/cosmos/ibc-go/pull/8476) Remove `ParamSubspace` from all `Keeper` constructors
  * (light-clients/08-wasm) [#8511](https://github.com/cosmos/ibc-go/pull/8511) Remove deprecated `Checksums` type
  * (core/02-client) [#8516](https://github.com/cosmos/ibc-go/pull/8516) Remove deprecated `SubmitMisbehaviour` message handler

  ## Testing API

  * [#8366](https://github.com/cosmos/ibc-go/pull/8366) - Replaced the deprecated `codec.ProtoMarshaler` interface with `proto.Message`.
</Update>