What is CVE-2026-42033?

CVE-2026-42033 is a high-severity vulnerability in Axios, classified under Improperly Controlled Modification of Object Prototype Attributes (Prototype Pollution). CVSS score: 7.4/10. Published 2026-04-24.

How severe is CVE-2026-42033?

High severity. CVSS v3 base score is 7.4 out of 10.

Prototype Pollution in Axios

CVE-2026-42033

Axios is a promise based HTTP client for the browser and Node.js. Prior to 1.15.1 and 0.31.1, when Object.prototype has been polluted by any co-dependency with keys that axios reads without a hasOwnProperty guard, an attacker can (a) silen…

Vulnerability class: Prototype Pollution

EPSS: 0.000 (13.6th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 7.4 (High). Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:N.

Affected products

Axios — versions >= 1.0.0, < 1.15.1, < 0.31.1

Weakness classification (CWE)

CWE-1321 — Improperly Controlled Modification of Object Prototype Attributes (Prototype Pollution)

References

https://github.com/axios/axios/security/advisories/GHSA-pf86-5x62-jrwf (x_refsource_CONFIRM)

Frequently asked questions

What is CVE-2026-42033?: CVE-2026-42033 is a high-severity vulnerability in Axios, classified under Improperly Controlled Modification of Object Prototype Attributes (Prototype Pollution). CVSS score: 7.4/10. Published 2026-04-24.
How severe is CVE-2026-42033?: High severity. CVSS v3 base score is 7.4 out of 10.