CVE-2026-46681
HIGH@nevware21/ts-utils: Prototype Pollution in objDeepCopy/objCopyProps via for...in without hasOwnProperty
Title source: cnaDescription
@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.
References (2)
Core 2
Core References
X_Refsource_Confirm x_refsource_confirm
https://github.com/nevware21/ts-utils/security/advisories/GHSA-x7j8-49r8-mr43
X_Refsource_Misc x_refsource_misc
https://github.com/nevware21/ts-utils/commit/5e887f4e2fbee7160c8f501634c45e6a229e83bb
Scores
CVSS v4
7.2
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/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
CISA SSVC
Vulnrichment
Exploitation
poc
Automatable
yes
Technical Impact
total
Details
CWE
CWE-1321
Status
published
Products (1)
nevware21/ts-utils
< 0.14.0
Published
Jul 21, 2026
Tracked Since
Jul 21, 2026