CVE-2026-46510— Prototype pollution in form-data-objectizer via bracket-notation form keys
Possible ATT&CK Techniques 2AI
T1059 · Command and Scripting Interpreter T1556 · Modify Authentication ProcessAffected Version Matrix 1
| Vendor | Product | Version Range | Status |
|---|---|---|---|
| kaspernj | form-data-objectizer | < 1.0.1 | affected |
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I. Basic Information for CVE-2026-46510
Vulnerability Information
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Vulnerability Title
Prototype pollution in form-data-objectizer via bracket-notation form keys
Source: NVD (National Vulnerability Database)
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.
Source: NVD (National Vulnerability Database)
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:L
Source: NVD (National Vulnerability Database)
Vulnerability Type
CWE-1321
Source: NVD (National Vulnerability Database)
Affected Products
| Vendor | Product | Affected Versions | CPE | Subscribe |
|---|---|---|---|---|
| kaspernj | form-data-objectizer | < 1.0.1 | - |
II. Public POCs for CVE-2026-46510
| # | POC Description | Source Link | Shenlong Link |
|---|
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Patches & Fixes for CVE-2026-46510 (1)
Vendor Advisories for CVE-2026-46510 (1)
IV. Related Vulnerabilities
Same weakness: CWE-1321
V. Comments for CVE-2026-46510
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