Intel

AIKIDO-2025-10391

es-toolkit is vulnerable to Prototype Pollution

Prototype Pollution Pre-CVE
Found by Aikido Intel before public disclosure or CVE publication.
Published Jun 23, 2025

66

Medium Risk

This Affects:

jses-toolkit
0.0.1 - 1.39.3
Fixed in 1.39.4
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TL;DR

Affected versions of this package are vulnerable to potential prototype pollution, which could allow attackers to manipulate object properties and impact application behavior.

Who does this affect?

You are affected if you are using a version which is within vulnerability ranges

Background info

es-toolkit is vulnerable to Prototype Pollution in versions 0.0.1 - 1.39.3.

How to fix this

Upgrade the es-toolkit library to the patch version.