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

# Security Audits

> Security audit reports for IBC-Go v8 features and components

## Overview

IBC-Go v8 includes several major features that have undergone comprehensive security audits by leading blockchain security firms. These audits ensure the security and reliability of critical IBC functionality including channel upgrades, enhanced token transfers, WASM light clients, and interchain accounts.

## Feature Audit Reports

### Channel Upgrades (ICS-04)

**Auditor**: Atredis Partners
**Completion Date**: March 2024
**Version**: Report v1.1
**Pages**: 38

Channel upgrades allow existing IBC channels to modify their parameters without closing and reopening connections. This audit covers the complete upgrade handshake mechanism, state transitions, and security considerations.

<Card title="Channel Upgrades Audit Report" icon="file-pdf" href="https://github.com/cosmos/ibc-go/blob/main/docs/audits/04-channel-upgrades/Atredis%20Partners%20-%20Interchain%20Foundation%20IBC-Go%20Channel%20Upgrade%20Feature%20Assessment%20-%20Report%20v1.1.pdf">
  Security assessment of channel upgrade functionality (38 pages)
</Card>

### ICS-20 Token Transfer v2

**Auditor**: Atredis Partners
**Completion Date**: February 2024
**Pages**: 41

The ICS-20 v2 token transfer module introduces multi-denomination support, enhanced memo fields, forwarding middleware, and path unwinding capabilities. This audit evaluates all new features and their security implications.

<Card title="ICS-20 v2 Audit Report" icon="file-pdf" href="https://github.com/cosmos/ibc-go/blob/main/docs/audits/20-token-transfer/Atredis%20Partners%20-%20Interchain%20ICS20%20v2%20New%20Features%20Assessment%20-%20Report%20v1.0.pdf">
  Assessment of enhanced token transfer features (41 pages)
</Card>

### 08-WASM Light Client

The WASM light client module enables custom light client implementations via WebAssembly, providing flexibility for supporting diverse blockchain consensus mechanisms.

#### Halborn Security Audit

**Auditor**: Halborn
**Completion Date**: February 2023
**Pages**: 55

<Card title="WASM Client Halborn Audit" icon="file-pdf" href="https://github.com/cosmos/ibc-go/blob/main/docs/audits/08-wasm/Halborn%20audit%20report.pdf">
  Comprehensive security assessment of WASM light client (55 pages)
</Card>

#### Technical Review

**Reviewer**: Ethan Frey
**Type**: Architecture and Implementation Review

<Card title="WASM Client Technical Review" icon="file-pdf" href="https://github.com/cosmos/ibc-go/blob/main/docs/audits/08-wasm/Ethan%20Frey%20-%20Wasm%20Client%20Review.pdf">
  Expert review of WASM client design and implementation
</Card>

### Interchain Accounts (ICS-27)

**Auditor**: Trail of Bits
**Pages**: 42

Interchain Accounts enable cross-chain account control, allowing chains to securely control accounts on other IBC-enabled chains. This audit covers both controller and host implementations.

<Card title="Interchain Accounts Audit" icon="file-pdf" href="https://github.com/cosmos/ibc-go/blob/main/docs/audits/27-interchain-accounts/Trail%20of%20Bits%20audit%20-%20Final%20Report.pdf">
  Trail of Bits security assessment (42 pages)
</Card>

## Audit Coverage

These audits comprehensively evaluate:

### Security Architecture

* Threat modeling and attack vectors
* Trust boundaries and assumptions
* Cryptographic implementations
* State machine correctness

### Code Quality

* Memory safety and resource management
* Error handling and edge cases
* Input validation and sanitization
* Concurrency and race conditions

### Protocol Compliance

* IBC specification adherence
* Backwards compatibility
* Upgrade path safety
* Interoperability guarantees

## Key Findings and Mitigations

All critical and high-severity findings identified in these audits have been addressed in v8.5.x. The audit reports include:

* Detailed vulnerability descriptions
* Risk assessments and impact analysis
* Recommended mitigations
* Implementation responses

## Best Practices for Developers

When working with IBC-Go v8.5.x:

1. **Review Feature Audits**: Consult relevant audit reports before implementing features
2. **Follow Security Guidelines**: Implement the security patterns recommended in audits
3. **Validate Inputs**: Always validate cross-chain messages and parameters
4. **Handle Errors Gracefully**: Implement robust error handling for IBC operations
5. **Test Edge Cases**: Include security test cases based on audit findings

## Ongoing Security Efforts

The IBC-Go team continuously improves security through:

* Regular security audits for new features
* Bug bounty programs
* Security advisory system
* Collaboration with security researchers
* Rapid patching of vulnerabilities

## Reporting Security Issues

To report security vulnerabilities, please follow the [IBC-Go Security Policy](https://github.com/cosmos/ibc-go/security/policy) for responsible disclosure.

## Additional Resources

* [IBC Protocol Specification](https://github.com/cosmos/ibc)
* [IBC-Go v8.5.x Documentation](/ibc/v8.5.x)
* [Migration Guides](/ibc/v8.5.x/migrations/v7-to-v8)