---
id: CVE-2021-3840
aliases:
  - GHSA-hgc3-hp6x-wpgx
  - PYSEC-2021-840
title: Antilles Dependency Confusion Vulnerability
summary: Antilles Dependency Confusion Vulnerability
severity: high
cvss: 8.8
cvssVector: 'CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H'
vendor: antilles-tools
product: antilles-tools
ecosystem: pip
affected:
  - antilles-tools < 1.0.1
patched:
  - antilles-tools 1.0.1
published: '2021-11-03'
updated: '2026-07-08'
source: OSV
sourceUrl: 'https://osv.dev/vulnerability/GHSA-hgc3-hp6x-wpgx'
references:
  - url: 'https://github.com/lenovo/Antilles/security/advisories/GHSA-hgc3-hp6x-wpgx'
  - url: 'https://nvd.nist.gov/vuln/detail/CVE-2021-3840'
  - url: >-
      https://github.com/lenovo/Antilles/commit/c7b9c5740908b343aceefe69733d9972e64df0b9
  - url: 'https://github.com/lenovo/Antilles'
  - url: >-
      https://github.com/pypa/advisory-database/tree/main/vulns/antilles-tools/PYSEC-2021-840.yaml
tags:
  - osv
  - pip
epss: 0.02036
epssPercentile: 0.8026
ingestedAt: '2026-07-08T18:25:50.198Z'
---

## Overview

### Potential Impact: 
Remote code execution.

### Scope of Impact: 
Open-source project specific.

### Summary Description:
A dependency confusion vulnerability was reported in the Antilles open-source software prior to version 1.0.1 that could allow for remote code execution during installation due to a package listed in requirements.txt not existing in the public package index (PyPi). 
MITRE classifies this weakness as an Uncontrolled Search Path Element (CWE-427) in which a private package dependency may be replaced by an unauthorized package of the same name published to a well-known public repository such as PyPi.
The configuration has been updated to only install components built by Antilles, removing all other public package indexes. Additionally, the antilles-tools dependency has been published to PyPi.

### Mitigation Strategy for Customers (what you should do to protect yourself):
Remove previous versions of Antilles as a precautionary measure and Update to version 1.0.1 or later.

### Acknowledgement:
The Antilles team thanks Kotko Vladyslav for reporting this issue.

### References:
https://github.com/lenovo/Antilles/commit/c7b9c5740908b343aceefe69733d9972e64df0b9


## Affected packages

- `antilles-tools < 1.0.1`

## Remediation

Upgrade to a patched release:

- `antilles-tools 1.0.1`