CVE-2021-41116

Command injection in composer on Windows

CRITICAL

9.8

CVSS Score

Published: October 5, 2021 at 05:40 PM UTC

Updated: June 17, 2026 at 04:07 AM UTC

3 products affected across 3 vendorsTenable.ScComposerComposer

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Severity

CRITICAL9.8

Exploit prediction

EPSS 3%

Description

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.

Affected

Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.

Composer · Getcomposer

95%

v < 1.10.232.0.0 ≤ v < 2.1.9

Affected range stops below 1.10.23, so it looks safe — our inference, not a vendor statement

Affected range stops below 2.1.9, so it looks safe — our inference, not a vendor statement

Tenable.Sc · Tenabledrupal

95%

v < 5.21.0

Affected range stops below 5.21.0, so it looks safe — our inference, not a vendor statement

Composer · Composercomposer

60%

v < 1.10.23v < 2.1.9

Affected range stops below 1.10.23, so it looks safe — our inference, not a vendor statement

Affected range stops below 2.1.9, so it looks safe — our inference, not a vendor statement

Remediation

No guide yet

No remediation guidance has been written for this CVE yet. What the record does show:

Patch and advisory references

https://github.com/composer/composer/commit/ca5e2f8d505fd3bfac6f7c85b82f2740becbc0aa

References (3)

x_refsource_MISCPatchThird Party Advisory

Source: [email protected]

https://github.com/composer/composer/commit/ca5e2f8d505fd3bfac6f7c85b82f2740becbc0aa

x_refsource_CONFIRMThird Party Advisory

Source: [email protected]

https://github.com/composer/composer/security/advisories/GHSA-frqg-7g38-6gcf

x_refsource_MISC

Source: [email protected]

https://www.sonarsource.com/blog/securing-developer-tools-package-managers/

CVSS

9.8CRITICAL[email protected]

Attack Vector: NETWORK
Complexity: LOW
Privileges: NONE
User Interaction: NONE
Scope: UNCHANGED
Confidentiality: HIGH
Integrity: HIGH
Availability: HIGH

Vector?

Quick Info

StatusMODIFIED

CWE

CWE-77

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