Vulnerability Description
form-data-objectizer converts FormData to object. Prior to 1.0.1, form-data-objectizer walks bracket-notation form keys (e.g. name[sub]) into nested objects without filtering __proto__, constructor, or prototype. A single HTTP form field whose name starts with __proto__[...] causes the library to mutate Object.prototype, which is a prototype pollution primitive of the entire Node.js process. This vulnerability is fixed in 1.0.1.
CVSS Score
HIGH
Related Weaknesses (CWE)
References
- https://github.com/kaspernj/form-data-objectizer/commit/7c54b99408e6e9cd6533b724
- https://github.com/kaspernj/form-data-objectizer/security/advisories/GHSA-m2hg-w
- https://github.com/kaspernj/form-data-objectizer/security/advisories/GHSA-m2hg-w
FAQ
What is CVE-2026-46510?
CVE-2026-46510 is a vulnerability with a CVSS score of 8.2 (HIGH). form-data-objectizer converts FormData to object. Prior to 1.0.1, form-data-objectizer walks bracket-notation form keys (e.g. name[sub]) into nested objects without filtering __proto__, constructor, o...
How severe is CVE-2026-46510?
CVE-2026-46510 has been rated HIGH with a CVSS base score of 8.2/10. Review the CVSS metrics above for detailed severity breakdown.
Is there a patch for CVE-2026-46510?
Check the references section above for vendor advisories and patch information. Review vendor security bulletins for remediation guidance.