CVE-2026-42264

Description

Axios is a promise based HTTP client for the browser and Node.js. From version 1.0.0 to before version 1.15.2, fFive config properties (auth, baseURL, socketPath, beforeRedirect, and insecureHTTPParser) in the HTTP adapter are read via direct property access without hasOwnProperty guards, making them exploitable as prototype pollution gadgets. When Object.prototype is polluted by another dependency in the same process, axios silently picks up these polluted values on every outbound HTTP request. This issue has been patched in version 1.15.2.

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CVSS v3.1 Score

7.4

HIGH

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

EPSS — Exploit Prediction

0.0009

Probability of exploitation

0.26%

Percentile rank

EPSS estimates the probability that this vulnerability will be exploited in the wild within the next 30 days. A higher score means more likely to be exploited.

Weakness Type (CWE)

CWE-1321 CWE-1321

Affected Products

Vendor	Product	Versions
axios	axios	1.0.0 — 1.15.2

References

Advisories & Patches

https://github.com/axios/axios/commit/47915144662f2733e6c051bdcb895a8c8f0586aa https://github.com/axios/axios/pull/10779 https://github.com/axios/axios/security/advisories/GHSA-q8qp-cvcw-x6jj https://github.com/axios/axios/security/advisories/GHSA-q8qp-cvcw-x6jj

Exploits

https://github.com/axios/axios/security/advisories/GHSA-q8qp-cvcw-x6jj https://github.com/axios/axios/security/advisories/GHSA-q8qp-cvcw-x6jj

Other References

https://github.com/axios/axios/releases/tag/v1.15.2

Frequently Asked Questions

What is CVE-2026-42264? +

Axios is a promise based HTTP client for the browser and Node.js. From version 1.0.0 to before version 1.15.2, fFive config properties (auth, baseURL, socketPath, beforeRedirect, and insecureHTTPParser) in the HTTP adapter are read via direct property access without hasOwnProperty guards, making them exploitable as prototype pollution gadgets. When Object.prototype is polluted by another dependency in the same process, axios silently picks up these polluted values on every outbound HTTP request. This issue has been patched in version 1.15.2. It has a CVSS v3.1 base score of 7.4 (HIGH).

How severe is CVE-2026-42264? +

CVE-2026-42264 has a CVSS v3.1 score of 7.4 out of 10, rated HIGH. This is a high-severity vulnerability that should be prioritized for patching. The EPSS score is 0.0009, placing it in the 0th percentile for exploitation probability.

What products are affected by CVE-2026-42264? +

CVE-2026-42264 affects products from axios, specifically: axios. Check the affected products table above for specific version ranges.

How do I check if I'm vulnerable to CVE-2026-42264? +

You can use Secably's free Website Scanner to check your website for known vulnerabilities. For infrastructure scanning, use the Port Scanner to identify exposed services that may be affected. Check the vendor advisories linked above for specific patch and version information.

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