---
id: CVE-2023-33964
aliases:
  - GHSA-7xpv-4pm9-xch2
  - GO-2023-1806
title: mx-chain-go does not treat invalid transaction with wrong username correctly
summary: mx-chain-go does not treat invalid transaction with wrong username correctly
severity: high
cvss: 8.6
cvssVector: 'CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:H/A:N'
vendor: multiversx
product: github.com/multiversx/mx-chain-go
ecosystem: go
affected:
  - github.com/multiversx/mx-chain-go < 1.4.16
patched:
  - github.com/multiversx/mx-chain-go 1.4.16
published: '2023-06-02'
updated: '2026-09-10'
sourceUpdated: '2026-09-10T03:50:02.162132662Z'
source: OSV
sourceUrl: 'https://osv.dev/vulnerability/GHSA-7xpv-4pm9-xch2'
references:
  - url: >-
      https://github.com/multiversx/mx-chain-go/security/advisories/GHSA-7xpv-4pm9-xch2
  - url: 'https://nvd.nist.gov/vuln/detail/CVE-2023-33964'
  - url: >-
      https://github.com/multiversx/mx-chain-go/commit/97295471465f4b5f79e51b32f8b7111f8d921606
  - url: 'https://github.com/multiversx/mx-chain-go'
tags:
  - osv
  - go
epss: 0.00569
epssPercentile: 0.45924
ingestedAt: '2026-09-12T03:13:01.765Z'
---

## Overview

### Impact
Metachain cannot process a cross-shard miniblock.
An invalid transaction with the wrong username on metachain is not treated correctly on the metachain transaction processor. This is strictly a processing issue that could have happened on MultiversX chain. If an error like this had occurred, the metachain would have stopped notarizing blocks from the shard chains. The resuming of notarization is possible only after applying a patched binary version. 
 
### Patches
Introduce processIfTxErrorCrossShard for metachain transaction processor. 

### Workarounds
No

### References
No


## Affected packages

- `github.com/multiversx/mx-chain-go < 1.4.16`

## Remediation

Upgrade to a patched release:

- `github.com/multiversx/mx-chain-go 1.4.16`