Vulnerability Description
axios before 0.33.0 (and 1.x before 1.18.0) can consume inherited properties from nested request option objects when the JavaScript process's Object.prototype has already been polluted by another component. While the top-level merged config uses a null prototype, nested plain objects such as auth and paramsSerializer are cloned into ordinary objects and read without own-property checks. When an application passes placeholder nested objects such as auth: {} or paramsSerializer: {}, inherited username/password values can cause silent injection of an Authorization: Basic header, and inherited encode/serialize values can alter query-string serialization (full serializer replacement requires a function-valued pollution primitive). This is exploitable only in the presence of pre-existing prototype pollution.
Related Weaknesses (CWE)
References
- https://github.com/axios/axios/security/advisories/GHSA-7q8q-rj6j-mhjq
- https://www.vulncheck.com/advisories/axios-before-prototype-pollution-via-nested
- https://github.com/axios/axios/security/advisories/GHSA-7q8q-rj6j-mhjq
FAQ
What is CVE-2026-67319?
CVE-2026-67319 is a documented vulnerability. axios before 0.33.0 (and 1.x before 1.18.0) can consume inherited properties from nested request option objects when the JavaScript process's Object.prototype has already been polluted by another comp...
How severe is CVE-2026-67319?
CVSS scoring is not yet available for CVE-2026-67319. Check NVD for updates.
Is there a patch for CVE-2026-67319?
Check the references section above for vendor advisories and patch information. Review vendor security bulletins for remediation guidance.