# GO-2023-1860 - IBC protocol "Huckleberry" vulnerability in github.com/cosmos/ibc-go

Source: https://junglewise.ai/threats/go-2023-1860-ibc-protocol-huckleberry-vulnerability-in-github-com-932c17e8  
Publisher: Junglewise Threat Intelligence, https://junglewise.ai/threats  
Published: 2023-06-15  
License: CC BY 4.0 with a link back

Severity: info · Published 2023-06-15

IBC protocol "Huckleberry" vulnerability in github.com/cosmos/ibc-go

Technologies: [github.com/cosmos/ibc-go/v4 (Go)](https://junglewise.ai/threats/technologies/github-com-cosmos-ibc-go-v4), [github.com/cosmos/ibc-go/v5 (Go)](https://junglewise.ai/threats/technologies/github-com-cosmos-ibc-go-v5), [github.com/cosmos/ibc-go/v6 (Go)](https://junglewise.ai/threats/technologies/github-com-cosmos-ibc-go-v6), [github.com/cosmos/ibc-go/v7 (Go)](https://junglewise.ai/threats/technologies/github-com-cosmos-ibc-go-v7). Vendors: [Go](https://junglewise.ai/threats/vendors/go).

## Quick answers

**Is This vulnerability exploited in the wild?** No. Junglewise Threat Intelligence has no report of This vulnerability being exploited in the wild.

**How severe is This vulnerability?** Informational severity, published 15 June 2023.

**Which products and versions are affected?** github.com/cosmos/ibc-go/v4 (Go) SEMVER:introduced=0,fixed=4.1.3,introduced=4.2.0,fixed=4.2.2,introduced=4.3.0,fixed=4.3.1,introduced=4.4.0,fixed=4.4.1; github.com/cosmos/ibc-go/v5 (Go) SEMVER:introduced=0,fixed=5.2.1,introduced=5.3.0,fixed=5.3.1; github.com/cosmos/ibc-go/v6 (Go) SEMVER:introduced=0,fixed=6.1.1; github.com/cosmos/ibc-go/v7 (Go) SEMVER:introduced=0,fixed=7.0.1.

**Is there a fix for This vulnerability?** Yes. github.com/cosmos/ibc-go/v4 (Go): upgrade to 4.4.1 or later; github.com/cosmos/ibc-go/v5 (Go): upgrade to 5.3.1 or later; github.com/cosmos/ibc-go/v6 (Go): upgrade to 6.1.1 or later; github.com/cosmos/ibc-go/v7 (Go): upgrade to 7.0.1 or later. Junglewise finds every place you run it, drafts the upgrade and applies it once you approve.

**Am I affected?** Check whether you run github.com/cosmos/ibc-go/v4 (Go), github.com/cosmos/ibc-go/v5 (Go), github.com/cosmos/ibc-go/v6 (Go) or one of the others listed at an affected version. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.

## How to fix

- github.com/cosmos/ibc-go/v4 (Go): upgrade to 4.4.1 or later

  ```sh
  go get github.com/cosmos/ibc-go/v4@v4.4.1
  ```

- github.com/cosmos/ibc-go/v5 (Go): upgrade to 5.3.1 or later

  ```sh
  go get github.com/cosmos/ibc-go/v5@v5.3.1
  ```

- github.com/cosmos/ibc-go/v6 (Go): upgrade to 6.1.1 or later

  ```sh
  go get github.com/cosmos/ibc-go/v6@v6.1.1
  ```

- github.com/cosmos/ibc-go/v7 (Go): upgrade to 7.0.1 or later

  ```sh
  go get github.com/cosmos/ibc-go/v7@v7.0.1
  ```


## Affected products

- github.com/cosmos/ibc-go/v4 (Go) SEMVER:introduced=0,fixed=4.1.3,introduced=4.2.0,fixed=4.2.2,introduced=4.3.0,fixed=4.3.1,introduced=4.4.0,fixed=4.4.1
- github.com/cosmos/ibc-go/v5 (Go) SEMVER:introduced=0,fixed=5.2.1,introduced=5.3.0,fixed=5.3.1
- github.com/cosmos/ibc-go/v6 (Go) SEMVER:introduced=0,fixed=6.1.1
- github.com/cosmos/ibc-go/v7 (Go) SEMVER:introduced=0,fixed=7.0.1

## Related threats

- [GO-2025-3517 - Non-deterministic JSON Unmarshalling of IBC Acknowledgement can result in a chain halt in github.com/cosmos/ibc-go](https://junglewise.ai/threats/go-2025-3517-non-deterministic-json-unmarshalling-of-ibc-72ab7629)
- [IBC-Go: Non-deterministic JSON Unmarshalling of IBC Acknowledgement can result in a chain halt](https://junglewise.ai/threats/ibc-go-non-deterministic-json-unmarshalling-of-ibc-acknowledgement-can-2786bdea)
- [GO-2025-3494 - IBC-Go has Non-deterministic JSON Unmarshalling of IBC Acknowledgement in github.com/cosmos/ibc-go](https://junglewise.ai/threats/go-2025-3494-ibc-go-has-non-deterministic-json-unmarshalling-of-ibc-788b0445)
- [IBC-Go has Non-deterministic JSON Unmarshalling of IBC Acknowledgement](https://junglewise.ai/threats/ibc-go-has-non-deterministic-json-unmarshalling-of-ibc-acknowledgement-5c4c6915)
- [GO-2024-2874 - Inter-Blockchain Communication (IBC) protocol "Huckleberry" vulnerability in github.com/cosmos/ibc-go](https://junglewise.ai/threats/go-2024-2874-inter-blockchain-communication-ibc-protocol-huckleberry-5e53251a)