CVE-2026-25639
Axios is Vulnerable to Denial of Service via __proto__ Key in mergeConfig
7.5
HIGH
CVSS 3.1
EPSS 0.04%
Description
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.
How to fix CVE-2026-25639
To remediate CVE-2026-25639, upgrade the affected package to a fixed version below.
- —no fix listed
- —upgrade to 1.13.5 or later
Is CVE-2026-25639 being exploited?
Low — EPSS is 0.0%, meaning exploitation activity has not been observed at scale.
Affected packages (2)
- from 0
- >= 1.0.0, < 1.13.5
CVSS scores
| Source | Version | Severity | Vector |
|---|---|---|---|
| osv | CVSS 3.1 | HIGH7.5 | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H |