# GO-2025-3494 - IBC-Go has Non-deterministic JSON Unmarshalling of IBC Acknowledgement in github.com/cosmos/ibc-go

Source: https://junglewise.ai/threats/go-2025-3494-ibc-go-has-non-deterministic-json-unmarshalling-of-ibc-788b0445  
Publisher: Junglewise Threat Intelligence, https://junglewise.ai/threats  
Published: 2025-03-05  
License: CC BY 4.0 with a link back

Severity: info · Published 2025-03-05

IBC-Go has Non-deterministic JSON Unmarshalling of IBC Acknowledgement in github.com/cosmos/ibc-go

Technologies: [github.com/cosmos/ibc-go (Go)](https://junglewise.ai/threats/technologies/github-com-cosmos-ibc-go), [github.com/cosmos/ibc-go/v2 (Go)](https://junglewise.ai/threats/technologies/github-com-cosmos-ibc-go-v2), [github.com/cosmos/ibc-go/v3 (Go)](https://junglewise.ai/threats/technologies/github-com-cosmos-ibc-go-v3), [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), [github.com/cosmos/ibc-go/v8 (Go)](https://junglewise.ai/threats/technologies/github-com-cosmos-ibc-go-v8). 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 5 March 2025.

**Which products and versions are affected?** github.com/cosmos/ibc-go (Go) SEMVER:introduced=0; github.com/cosmos/ibc-go/v2 (Go) SEMVER:introduced=0; github.com/cosmos/ibc-go/v3 (Go) SEMVER:introduced=0; github.com/cosmos/ibc-go/v4 (Go) SEMVER:introduced=0; and 4 more.

**Is there a fix for This vulnerability?** Yes. github.com/cosmos/ibc-go/v7 (Go): upgrade to 7.9.2 or later; github.com/cosmos/ibc-go/v8 (Go): upgrade to 8.6.1 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 (Go), github.com/cosmos/ibc-go/v2 (Go), github.com/cosmos/ibc-go/v3 (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/v7 (Go): upgrade to 7.9.2 or later

  ```sh
  go get github.com/cosmos/ibc-go/v7@v7.9.2
  ```

- github.com/cosmos/ibc-go/v8 (Go): upgrade to 8.6.1 or later

  ```sh
  go get github.com/cosmos/ibc-go/v8@v8.6.1
  ```


## Affected products

- github.com/cosmos/ibc-go (Go) SEMVER:introduced=0
- github.com/cosmos/ibc-go/v2 (Go) SEMVER:introduced=0
- github.com/cosmos/ibc-go/v3 (Go) SEMVER:introduced=0
- github.com/cosmos/ibc-go/v4 (Go) SEMVER:introduced=0
- github.com/cosmos/ibc-go/v5 (Go) SEMVER:introduced=0
- github.com/cosmos/ibc-go/v6 (Go) SEMVER:introduced=0
- github.com/cosmos/ibc-go/v7 (Go) SEMVER:introduced=0,fixed=7.9.2
- github.com/cosmos/ibc-go/v8 (Go) SEMVER:introduced=0,fixed=8.6.1

## 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)
- [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)
- [github.com/cosmos/ibc-go affected by IBC protocol "Huckleberry" vulnerability](https://junglewise.ai/threats/github-com-cosmos-ibc-go-affected-by-ibc-protocol-huckleberry-2ecb9284)