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.
Metrics
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References
History
Fri, 29 May 2026 13:45:00 +0000
| Type | Values Removed | Values Added |
|---|---|---|
| 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. | |
| Title | Prototype pollution in form-data-objectizer via bracket-notation form keys | |
| Weaknesses | CWE-1321 | |
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cvssV3_1
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MITRE
Status: PUBLISHED
Assigner: GitHub_M
Published:
Updated: 2026-05-29T13:40:22.772Z
Reserved: 2026-05-14T19:12:32.754Z
Link: CVE-2026-46510
Vulnrichment
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Redhat
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OpenCVE Enrichment
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