CVE-2021-41116

highpriority · track · 40EPSS 0.028 · 87 %ileEUUS

grimoire priorityP2 · Scheduled

Exploitable?

—

no known exploitation

Likely / severe?

2.83% (87th) EPSS

CVSS 7.5 · high

Is it mine?

9 products

Check your exposure

Who says so?

4 sources

cnnvd · enisa_euvd · osv · nvd

EPSS · scored 2026-10-27

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.

cvss

Technical severity, 0–10. One row per scoring source.

9.8

010

base score 0–10 · higher = more severe · hover a vector to decode⚠ sources disagree · high–critical · 7.5–9.8

v2.07.5highAV:N/AC:L/Au:N/C:P/I:P/A:Pprimary · NVD / NIST USexploitability 10 · impact 6.4

v3.19.8criticalCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:Hprimary · NVD / NIST USexploitability 3.9 · impact 5.9

v3.18.2highCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:H/I:L/A:Nsecondary · ENISA EU

v3.18.2highCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:H/I:L/A:Nsecondary · security-advisories@github.comexploitability 2.8 · impact 4.7

v3.18.2highCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:H/I:L/A:Nsecondary · OSV

v3.19criticalCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H/E:Usecondary · CVSS-BT (t0sche)

weaknesses

The CWE weakness classes this flaw belongs to.

CWE-77USprimaryCWE-77US

affected products (9)

Products and version ranges known to be affected.

composer composer≤ < 1.10.23enisa_euvdEU
composer composer2.0, → 2.1.9enisa_euvdEU
getcomposer composer< 1.10.23nvdUScpe:2.3:a:getcomposer:composer:*:*:*:*:*:*:*:*
getcomposer composer2.0.0 → 2.1.9nvdUScpe:2.3:a:getcomposer:composer:*:*:*:*:*:*:*:*
tenable tenable.sc< 5.21.0nvdUScpe:2.3:a:tenable:tenable.sc:*:*:*:*:*:*:*:*
Bitnami composer< 1.10.23osvUSpkg:bitnami/composer
Bitnami composer2.0.0 → 2.1.9osvUSpkg:bitnami/composer
Packagist composer/composer< 1.10.23osvUSpkg:composer/composer/composer
Packagist composer/composer2.0.0-alpha1 → 2.1.9osvUSpkg:composer/composer/composer

advisories (2)

Vendor and ecosystem advisories describing this.

GHSA-frqg-7g38-6gcfImproper escaping of command arguments on Windows leading to command injection2021-10-05ghsa · osvUS
### Impact Windows users running Composer to install untrusted dependencies are affected and should definitely upgrade for safety. Other OSs and WSL are not affected. ### Patches 1.10.23 and 2.1.9 fix the issue ### Workarounds None
BIT-composer-2021-41116Command injection in composer on Windows2024-03-06vendor · osvUS
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.

also known as (5)

Other names and identifiers for this entity.

sources

Which sources assert this record, and when.

cnnvd enisa_euvd osv nvd NVD CVE.org MITRE

published 2021-10-05modified 2026-06-17

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+4594 more

references (15)

External citations — patches, advisories, analysis.

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