Vulnerability record · CVE-2021-41116 · published 5 October 2021

CVE-2021-41116: Getcomposer composer command injection vulnerability

Getcomposer · Composer

Composer is an open source dependency manager for the PHP language. In affected versions windows users running Composer to install untrusted dependencies are subject to command injection and should upgrade their composer version. Other OSs and WSL are not affected. The issue has been resolved in composer versions 1.10.23 and 2.1.9. There are no workarounds for this issue.

9.8 CVSS 3.1 Critical EPSS 2.9% · top 13.6% CWE-77 · Command injection

9.8CVSS 3.1 base score, v2 7.5

2.9%EPSS exploitation probability, 30 days

NoNot in CISA KEV

2Affected product versions listed by NVD

6References

17 Jun 2026Last modified by NVD

Description

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Affected products

2 vulnerable configurations from NVD's CPE data, grouped by vendor and product.

Composer Getcomposer

Tenable.Sc Tenable

References

Link	Tags
https://github.com/composer/composer/commit/ca5e2f8d505fd3bfac6f7c85b82f2740becbc0aa	PatchThird Party Advisory
https://github.com/composer/composer/security/advisories/GHSA-frqg-7g38-6gcf	Third Party Advisory
https://www.sonarsource.com/blog/securing-developer-tools-package-managers/
https://github.com/composer/composer/commit/ca5e2f8d505fd3bfac6f7c85b82f2740becbc0aa	PatchThird Party Advisory
https://github.com/composer/composer/security/advisories/GHSA-frqg-7g38-6gcf	Third Party Advisory
https://www.sonarsource.com/blog/securing-developer-tools-package-managers/

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Same products first, then exploited flaws of the same weakness class.

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Source: NIST National Vulnerability Database (record CVE-2021-41116), CISA KEV, FIRST EPSS (scores of 2026-09-26). This page is refreshed as NVD updates the record.