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CVE-2021-3749 — Vulnerability in axios — CVE Details

HIGH

axios Inefficient Regular Expression Complexity vulnerability

Published September 1, 2021Updated September 10, 2026Source: osv

What Should I Do?

Address in Next Maintenance Window

Low exploitation probability (1.49%). Schedule for your next planned update.

Summary

axios before v0.21.2 is vulnerable to Inefficient Regular Expression Complexity.

Advisory Timeline

  • First published September 1, 2021 (1867 days ago).
  • Last revised September 10, 2026 — 1834 days after initial publication.

Remediation

Upgrade to the fixed version using your package manager.

npm
Update axios to 0.21.2 or later
npm install axios@0.21.2

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

Affected Packages (1)

Affects 1 ecosystem: npm (1).

PackageEcosystemAffectedFixed In
axios
npm
All versions0.21.2

Vulnerability Classification

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

CVSS Score Breakdown

What the CVSS (Common Vulnerability Scoring System) 7.5 score means for each attack dimension.

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

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

References

Frequently Asked Questions

What is CVE-2021-3749?
axios Inefficient Regular Expression Complexity vulnerability This vulnerability has been assigned a severity rating of HIGH (CVSS score: 7.5/10).
How do I check if my project is affected by CVE-2021-3749?
CVE-2021-3749 affects axios. It has a 1.5% probability of exploitation within 30 days (EPSS score). Use GeekWala's free vulnerability scanner to check your dependencies against CVE-2021-3749 and 200,000+ other known vulnerabilities.

Severity & Exploitability

CVSS Score
7.5

High exploitability or significant impact. Prioritize remediation within days.

EPSS Score (30-day exploit probability)
1.49%
Higher than 81% of vulnerabilities

This places it in the top quartile of EPSS-scored vulnerabilities — 80.8% 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-cph5-m8f7-6c5x

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