CVE-2026-46681 | @nevware21/ts-utils is a comprehensive TypeScript/JavaScript… | CVSS 7.2 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.

Metadata

CVE ID: CVE-2026-46681
State: PUBLISHED
Assigner: GitHub_M
Reserved: 2026-05-15 21:46 UTC
Published: 2026-07-21 14:02 UTC
Last updated: 2026-07-21 15:00 UTC
Primary CWE: CWE-1321
CWE-1321: Improperly Controlled Modification of Object Proto…
Vendor / Product: nevware21 / ts-utils
Sources: cve.org · NVD

Severity & Metrics

7.2 HIGH CVSS 4.0

CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:U

SSVC — CISA Coordinator

Exploitation: PoC
Automatable: yes
Tech. Impact: total

Affected products (1)

Vendor	Product	Platform	Versions
nevware21	ts-utils	—	< 0.14.0

Weakness (CWE)

CWE	Source	Description
CWE-1321	cna	CWE-1321: Improperly Controlled Modification of Object Prototype Attributes ('Prototype Pollution')

CVSS scores (1)

Score	Severity	Version	Source	Vector
7.2	HIGH	4.0	cna	CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:U

References (2)

https://github.com/nevware21/ts-utils/security/advisories/GHSA-x7j8-49r8-mr43 https://github.com/nevware21/ts-utils/security/advisories/GHSA-x7j8-49r8-mr43
https://github.com/nevware21/ts-utils/commit/5e887f4e2fbee7160c8f501634c45e6a229e83bb https://github.com/nevware21/ts-utils/commit/5e887f4e2fbee7160c8f501634c45e6a229e83bb