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CVE-2026-45302

Prototype Pollution in parse-nested-form-data via `__proto__` in FormData field names PUBLISHED

Description (CNA)

parse-nested-form-data is a tiny node module for parsing FormData by name into objects and arrays. Prior to version 1.0.1, parseFormData() walks bracket and dot-notation FormData field names into nested objects without filtering reserved property keys. A single FormData field whose name begins with __proto__, or contains .__proto__. mid-path, causes the parser to traverse onto Object.prototype and assign properties there, polluting the prototype chain of every plain object in the running process. This issue has been patched in version 1.0.1.

Affected (CNA)

Vendor / productVersions
milamer / parse-nested-form-dataaffected < 1.0.1

CWE

CWE-1321

References

ADP enrichment

CISA-ADP

No English description supplied.