CVE-2026-46681
High
Description
@nevware21/ts-utils is a comprehensive TypeScript/JavaScript utility library. Prior to version 0.14.0, 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. Version 0.14.0 patches the issue.
SeverityHigh
CVSS7.2
Exploit probability—
Product@nevware21/ts-utils
PublishedJul 21, 2026
First seenJul 21, 2026
Weakness typeCWE-1321Prototype pollution
How to fix
Update
- @nevware21/ts-utils0.14.0 or later
Affected products
| Product | Affected versions | Fixed in |
|---|---|---|
| @nevware21/ts-utilsnpm | v < 0.14.0 | 0.14.0 |
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