CVE-2021-26505

MrSwitch hello.js vulnerable to prototype pollution

Published 11 Aug 2023Modified 17 Jun 2026CWE 1321

In the Trivy database since at least 24 Oct 2026, 07:11 UTCWhen it arrived before that build is not recorded.

Severity by source

NVD9.8CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

GHSA9.8CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Trivy's own label is CRITICAL. Rated critical by NVD, GHSA.

Description

Prototype pollution vulnerability in MrSwitch hello.js version 1.18.6, allows remote attackers to execute arbitrary code via hello.utils.extend function.

Affected packages and fixed versions

Source	Package	Fixed in
npm::GitHub Security Advisory npm	hellojs	1.18.8

References

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