CVE-2026-44487: Axios: Proxy-Authorization Credential Leak to Origin Server Across HTTP-to-HTTPS Redirect in Axios Node.js HTTP Adapter

Severity: high (CVSS 7.5 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 0.7% probability of exploitation in the next 30 days
Public exploit or detection template: yes
Published: 2026-06-11 · updated 2026-09-11
Weakness: CWE-201

Description

Axios is a promise based HTTP client for the browser and Node.js. Prior to 0.32.0 and 1.16.0, Axios’s Node.js HTTP adapter may forward a Proxy-Authorization header to a redirected origin during specific proxy-to-direct redirect flows. This affects Node.js usage, where an initial HTTP request is sent through an authenticated HTTP proxy, redirects are followed, and the redirected URL is no longer proxied. Under affected redirect shapes, the final origin can receive the proxy credential that was intended only for the outbound proxy. This vulnerability is fixed in 0.32.0 and 1.16.0.

Affected products

axios: before 0.32.0; from 1.0.0 before 1.16.0 — fixed in 0.32.0, 1.16.0
Npm Axios: from 1.0.0 before 1.16.0; before 0.32.0 — fixed in 1.16.0, 0.32.0

How to fix

Upgrade to a fixed version: axios 0.32.0, 1.16.0; Npm Axios 1.16.0, 0.32.0. Check the vendor advisory for mitigations.

References

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