CVE-2026-101908: 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 1.7.0 until 1.20.0, the fetch adapter constructs a Request with sanitized resolvedOptions but then calls fetch with the original fetchOptions. A separate same-process prototype-pollution flaw populates Object.prototype.headers so fetchOptions.headers resolves through inheritance. The inherited fetchOptions.headers value overrides the sanitized Request headers through the second argument to fetch after Request construction. Attacker-controlled request headers can alter authorization, caching, metadata-service access, or application-specific behavior. This issue is fixed in version 1.20.0.

Affected products

• Axios Axios: from 1.7.0, before 1.20.0 (fixed in 1.20.0)

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