> ## Documentation Index
> Fetch the complete documentation index at: /docs/llms.txt
> Use this file to discover all available pages before exploring further.

# Changelog

> Release history and changelog for Cosmos IBC

> [!NOTE]
>
> 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.

**Release**

v11.0.0

## 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`.


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