Vulnerability · Published Jun 11, 2026 · Assigned by GitHub_M
CVE-2026-44489Axios: Proxy-Authorization Header Injection via Prototype Pollution — Incomplete Null-Prototype Fix
Low 3.7
In plain English
A low-severity prototype pollution in axios from axios. Proof-of-concept exploit code is public. The chance it is exploited in the next 30 days is estimated at 0.2% (higher than 15% of all known vulnerabilities). Fixed versions are available - upgrade the affected package.
Official description
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 packages & fixed versions
| Ecosystem | Package | Fixed in | Advisory |
|---|---|---|---|
| Debian:14 | node-axios | 1.16.0-1 | DEBIAN-CVE-2026-44489 |
| Ubuntu:25.10 | node-axios | no fix listed | UBUNTU-CVE-2026-44489 |
| Ubuntu:26.10 | node-axios | no fix listed | UBUNTU-CVE-2026-44489 |
| npm | axios | 1.16.0 | GHSA-654m-c8p4-x5fp |
Affected products (as reported)
Weakness: CWE-113, CWE-1321 · Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:L/A:N
References
- https://github.com/axios/axios/security/advisories/GHSA-654m-c8p4-x5fp x_refsource_CONFIRM