CVE-2026-42042

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.

• CWE-183
• CWE-201

• https://github.com/axios/axios/security/advisories/GHSA-xx6v-rp6x-q39cExploit, Mitigation, Vendor Advisory
• https://github.com/axios/axios/security/advisories/GHSA-xx6v-rp6x-q39cExploit, Mitigation, Vendor Advisory

Published

Apr 24, 2026

Last Modified

Jun 17, 2026

Status

Analyzed

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