Vulnerability Description
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.
CVSS Score
MEDIUM
Affected Products
| Vendor | Product | Versions |
|---|---|---|
| Axios | Axios | < 0.31.1 |
Related Weaknesses (CWE)
References
- https://github.com/axios/axios/security/advisories/GHSA-xx6v-rp6x-q39cExploitMitigationVendor Advisory
- https://github.com/axios/axios/security/advisories/GHSA-xx6v-rp6x-q39cExploitMitigationVendor Advisory
FAQ
What is CVE-2026-42042?
CVE-2026-42042 is a vulnerability with a CVSS score of 5.4 (MEDIUM). 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 b...
How severe is CVE-2026-42042?
CVE-2026-42042 has been rated MEDIUM with a CVSS base score of 5.4/10. Review the CVSS metrics above for detailed severity breakdown.
Is there a patch for CVE-2026-42042?
Check the references section above for vendor advisories and patch information. Affected products include: Axios Axios.