CVE-2026-25639

Axios affected by Denial of Service via __proto__ Key in mergeConfig

Axios is a promise based HTTP client for the browser and Node.js. Prior to versions 0.30.3 and 1.13.5, the mergeConfig function in axios crashes with a TypeError when processing configuration objects containing __proto__ as an own property. An attacker can trigger this by providing a malicious configuration object created via JSON.parse(), causing complete denial of service. This vulnerability is fixed in versions 0.30.3 and 1.13.5.

Affected

axios

CVSS v3.1 CNA

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

EPSS

1.99% chance of exploitation in the next 30 days, 80th percentile

Published

2026-02-09

Updated

2026-09-10

Proof-of-concept exploits (1)

• advisories/GHSA-43fc-jf86-j433

Security advisories

• axios/axios/security/advisories/GHSA-43fc-jf86-j433
• axios/axios/pull/7369

References

• CVE Record
• NVD entry