CVE-2026-101904: Axios

Medium severity, CVSS 6.9. EPSS: 0.4% chance of exploitation in the next 30 days.

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.

Affected products

• Axios Axios: from 1.0.0, before 1.20.0 (fixed in 1.20.0)

Published 2026-09-28. Last modified 2026-09-30.