CVE-2026-25047: deepHas vulnerable to Prototype Pollution via constructor.prototype

Severity: Critical

CVSS Score: 8.8

deepHas provides a test for the existence of a nested object key and optionally returns that key. A prototype pollution vulnerability exists in version 1.0.7 of the deephas npm package that allows an attacker to modify global object behavior. This issue was fixed in version 1.0.8.