What is CVE-2021-3840?

CVE-2021-3840 is a high-severity vulnerability in Antilles, classified under Uncontrolled Search Path Element. CVSS score: 8.8/10. Published 2021-11-12.

How severe is CVE-2021-3840?

High severity. CVSS v3 base score is 8.8 out of 10.

Vulnerability in Antilles

CVE-2021-3840

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.

Published 2021-11-12 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 8.8 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H.

EPSS exploit prediction

EPSS: 0.020 (80.4th percentile), scored 2026-10-01.

Low probability of exploitation in the next 30 days, but still tracked. 80th percentile — 80.4% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.020 · newest: 0.020 · change: +0.001

Affected products

Antilles — versions unspecified
Lenovo Antilles

Weakness classification (CWE)

CWE-427 — Uncontrolled Search Path Element

References

github.com/lenovo/Antilles/security/advisories/GHSA-hgc3-hp6x-wpgx (Patch, Third Party Advisory)

Frequently asked questions

What is CVE-2021-3840?: CVE-2021-3840 is a high-severity vulnerability in Antilles, classified under Uncontrolled Search Path Element. CVSS score: 8.8/10. Published 2021-11-12.
How severe is CVE-2021-3840?: High severity. CVSS v3 base score is 8.8 out of 10.