Critical severity9.8NVD Advisory· Published Aug 11, 2023· Updated Jun 17, 2026
CVE-2021-26505
CVE-2021-26505
Description
Prototype pollution vulnerability in MrSwitch hello.js version 1.18.6, allows remote attackers to execute arbitrary code via hello.utils.extend function.
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LLM-synthesized narrative grounded in this CVE's description and references.
Affected packages
Versions sourced from the GitHub Security Advisory.
| Package | Affected versions | Patched versions |
|---|---|---|
hellojsnpm | < 1.18.8 | 1.18.8 |
Affected products
3- cpe:2.3:a:hello.js_project:hello.js:1.18.6:*:*:*:*:node.js:*:*
- MrSwitch/hello.jsdescription
Patches
Vulnerability mechanics
References
4- github.com/advisories/GHSA-g3vf-47fv-8f3cghsaADVISORY
- nvd.nist.gov/vuln/detail/CVE-2021-26505ghsaADVISORY
- github.com/MrSwitch/hello.js/commit/7ab50aeff2d41991f08d4ad6c0481125eea8f6b7ghsaWEB
- github.com/MrSwitch/hello.js/issues/634nvdIssue TrackingWEB
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