CVE-2026-46681: NEVWARE21 Ts-Utils

High severity, CVSS 7.2. EPSS: 0.5% chance of exploitation in the next 30 days.

@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.

Affected products

• NEVWARE21 Ts-Utils: before 0.14.0 (fixed in 0.14.0)

Published 2026-07-21. Last modified 2026-07-23.