Prototype Pollution Vulnerability in Form-Data-Objectizer by KasperNJ
CVE-2026-46510

8.2HIGH

Key Information:

Vendor

Kaspernj

Status
Form-data-objectizer
Vendor
CVE Published:
29 May 2026

What is CVE-2026-46510?

The form-data-objectizer library, which transforms FormData into JavaScript objects, contains a vulnerability that allows for prototype pollution. Specifically, prior to version 1.0.1, it incorrectly handles bracket-notation keys, allowing an attacker to exploit names beginning with 'proto'. This flaw can lead to unintended modifications in the Object.prototype, creating potential security risks across the entire Node.js environment. Users are strongly advised to upgrade to version 1.0.1 to mitigate this issue.

Affected Version(s)

form-data-objectizer < 1.0.1

References

https://github.com/kaspernj/form-data-objectizer/security...
x_refsource_CONFIRM
https://github.com/kaspernj/form-data-objectizer/commit/7...
x_refsource_MISC

CVSS V3.1

Score:
8.2
Severity:
HIGH
Confidentiality:
None
Integrity:
High
Availability:
None
Attack Vector:
Network
Attack Complexity:
Low
Privileges Required:
None
User Interaction:
None
Scope:
Unchanged

Timeline

  • Vulnerability published

  • Vulnerability Reserved

.