What is CVE-2026-44490?

CVE-2026-44490 is a medium-severity vulnerability in Axios, classified under Improperly Controlled Modification of Object Prototype Attributes (Prototype Pollution). CVSS score: 4.8/10. Published 2026-06-11.

How severe is CVE-2026-44490?

Medium severity. CVSS v3 base score is 4.8 out of 10.

Prototype Pollution in Axios

CVE-2026-44490

Axios is a promise based HTTP client for the browser and Node.js. Prior to 0.32.0 and 1.16.0, axios exposes two read-side prototype-pollution gadgets. When Object.prototype is polluted by an upstream dependency in the same process (e.g. lo…

Vulnerability class: Prototype Pollution

EPSS: 0.003 (20.9th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 4.8 (Medium). Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:L/A:L.

Affected products

Axios — versions >= 1.0.0, < 1.16.0, < 0.32.0

Weakness classification (CWE)

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

References

security-advisories@github.com (x_refsource_CONFIRM, Exploit, Vendor Advisory)

Frequently asked questions

What is CVE-2026-44490?: CVE-2026-44490 is a medium-severity vulnerability in Axios, classified under Improperly Controlled Modification of Object Prototype Attributes (Prototype Pollution). CVSS score: 4.8/10. Published 2026-06-11.
How severe is CVE-2026-44490?: Medium severity. CVSS v3 base score is 4.8 out of 10.