CVE-2026-46681
Critical · 9.8@nevware21/ts-utils: Prototype Pollution in objDeepCopy/objCopyProps via for...in without hasOwnProperty
CVSS
9.8
EPSS
0.5%
Published
May 21, 2026
CISA due date
—
The record
The _copyProps function in lib/src/object/copy.ts uses for...in to iterate over source object properties without an Object.hasOwnProperty check, and does not filter dangerous keys (__proto__, constructor, prototype). This allows an attacker to pollute the prototype chain of all objects in the application.
Affected packages
| Ecosystem | Package | Introduced | Fixed |
|---|---|---|---|
| npm | @nevware21/ts-utils | 0 | 0.14.0 |
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