CVE-2026-44489: Axios

Medium severity, CVSS 5.3. EPSS: 0.3% chance of exploitation in the next 30 days.

Axios is a promise based HTTP client for the browser and Node.js. From 1.15.2 to before 1.16.0, nested objects created by utils.merge() (e.g., config.proxy) are still constructed as plain {} with Object.prototype in their chain. The setProxy() function at lib/adapters/http.js:209-223 reads proxy.username, proxy.password, and proxy.auth without hasOwnProperty checks. When Object.prototype.username is polluted, setProxy() constructs a Proxy-Authorization header with attacker-controlled credentials and injects it into every proxied HTTP request. This vulnerability is fixed in 1.16.0.

Affected products

• Axios Axios: version 1.15.2 only

Published 2026-06-11. Last modified 2026-06-17.