CVE-2026-42042: Axios

Medium severity, CVSS 5.4. EPSS: 0.3% chance of exploitation in the next 30 days.

Axios is a promise based HTTP client for the browser and Node.js. Prior to 1.15.1 and 0.31.1, the Axios library's XSRF token protection logic uses JavaScript truthy/falsy semantics instead of strict boolean comparison for the withXSRFToken config property. When this property is set to any truthy non-boolean value (via prototype pollution or misconfiguration), the same-origin check (isURLSameOrigin) is short-circuited, causing XSRF tokens to be sent to all request targets including cross-origin servers controlled by an attacker. This vulnerability is fixed in 1.15.1 and 0.31.1.

Affected products

• Axios Axios: before 0.31.1 (fixed in 0.31.1); from 1.0.0, before 1.15.1 (fixed in 1.15.1)

Published 2026-04-24. Last modified 2026-06-17.