CVE-2026-101904

Axios is a promise-based HTTP client for the browser and Node.js. From 1.0.0 until 1.20.0, the dispatchRequest function normalizes inherited Object.prototype.headers from a replacement request configuration. A separate same-process prototype-pollution flaw sets Object.prototype.headers, and trusted request interceptors return a new ordinary configuration without an own headers property. After the interceptor chain, dispatchRequest resolves the inherited headers during normalization. Downstream request processing can observe attacker-controlled headers, including authorization-related values. This issue is fixed in version 1.20.0.

• CWE-74
• CWE-1321

• https://github.com/axios/axios/commit/d19040bda7a8be2f82c3c6e1a5bc03917daee39a
• https://github.com/axios/axios/pull/11141
• https://github.com/axios/axios/releases/tag/v1.20.0
• https://github.com/axios/axios/security/advisories/GHSA-j8rh-479h-cp32
• https://github.com/axios/axios/security/advisories/GHSA-j8rh-479h-cp32

Published

Sep 28, 2026

Last Modified

Sep 28, 2026

Status

Received

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