CVE-2026-46510 | THREATINT

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.

PUBLISHED Reserved 2026-05-14 | Published 2026-05-29 | Updated 2026-05-29 | Assigner GitHub_M

HIGH: 8.2CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:L

Problem types

CWE-1321: Improperly Controlled Modification of Object Prototype Attributes (‘Prototype Pollution’)

Product status

< 1.0.1
affected

References

github.com/…ctizer/security/advisories/GHSA-m2hg-wjq3-28wq

github.com/…ommit/7c54b99408e6e9cd6533b7245bf197dadc2a2dbc

cve.org (CVE-2026-46510)

nvd.nist.gov (CVE-2026-46510)

Download JSON