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CVE-2021-44906 — Prototype Pollution in minimist — CVE Details

CRITICAL

Prototype Pollution in minimist

Published March 18, 2022Updated March 13, 2026Source: osv

What Should I Do?

Address in Next Maintenance Window

Low exploitation probability (0.88%). Schedule for your next planned update.

Summary

Minimist prior to 1.2.6 and 0.2.4 is vulnerable to Prototype Pollution via file `index.js`, function `setKey()` (lines 69-95).

Advisory Timeline

  • First published March 18, 2022 (1670 days ago).
  • Last revised March 13, 2026 — 1457 days after initial publication.

Remediation

Upgrade to the fixed version using your package manager.

npm
Update minimist to 1.2.6 or later
npm install minimist@1.2.6
npm
Update minimist to 0.2.4 or later
npm install minimist@0.2.4

After upgrading, run your dependency scanner again to confirm the vulnerability is resolved.

Affected Packages (2)

Affects 1 ecosystem: npm (1).

PackageEcosystemAffectedFixed In
minimist
npm
All versions1.2.6
minimist
npm
All versions0.2.4

Vulnerability Classification

Common Weakness Enumeration (CWE) identifiers for this vulnerability type.

  • CWE-1321
    Prototype PollutionMITRE

CVSS Score Breakdown

What the CVSS (Common Vulnerability Scoring System) 9.8 score means for each attack dimension.

Attack Vector
Network
Attack Complexity
Low
Privileges Required
None
User Interaction
None
Scope
Unchanged
Confidentiality
High
Integrity
High
Availability
High

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

References

Frequently Asked Questions

What is CVE-2021-44906?
Prototype Pollution in minimist This vulnerability has been assigned a severity rating of CRITICAL (CVSS score: 9.8/10).
How do I check if my project is affected by CVE-2021-44906?
CVE-2021-44906 affects minimist. It has a 0.9% probability of exploitation within 30 days (EPSS score). Use GeekWala's free vulnerability scanner to check your dependencies against CVE-2021-44906 and 200,000+ other known vulnerabilities.

Severity & Exploitability

CVSS Score
9.8

Exploitation is straightforward and causes maximum impact. Patch immediately.

EPSS Score (30-day exploit probability)
0.88%
Higher than 75% of vulnerabilities

This places it in the top quartile of EPSS-scored vulnerabilities — 75% of tracked vulnerabilities score at or below it, so it is more likely to be exploited than most of the tracked corpus.

Also Known As

GHSA-xvch-5gv4-984h

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