Description

Happy DOM is a JavaScript implementation of a web browser without its graphical user interface. Versions prior to 20.8.9 may attach cookies from the current page origin (`window.location`) instead of the request target URL when `fetch(..., { credentials: "include" })` is used. This can leak cookies from origin A to destination B. Version 20.8.9 fixes the issue.

INFO

Published Date :

2026-03-27T21:17:24.777Z

Last Modified :

2026-03-31T14:25:27.402Z

Source :

GitHub_M
AFFECTED PRODUCTS

The following products are affected by CVE-2026-34226 vulnerability.

Vendors Products
Capricorn86
  • Happy-dom
  • Happy Dom
REFERENCES

Here, you will find a curated list of external links that provide in-depth information to CVE-2026-34226.

URL Resource
https://github.com/capricorn86/happy-dom/blob/f8d8cad41e9722fab9eefb9dfb3cca696462e908/packages/happy-dom/src/fetch/utilities/FetchRequestHeaderUtility.ts cve-icon cve-icon cve-icon
https://github.com/capricorn86/happy-dom/commit/68324c21d7b98f53f7bb5a7b3e185bda7106e751 cve-icon cve-icon cve-icon
https://github.com/capricorn86/happy-dom/pull/2117 cve-icon cve-icon cve-icon
https://github.com/capricorn86/happy-dom/releases/tag/v20.8.9 cve-icon cve-icon cve-icon
https://github.com/capricorn86/happy-dom/security/advisories/GHSA-w4gp-fjgq-3q4g cve-icon cve-icon cve-icon
https://nvd.nist.gov/vuln/detail/CVE-2026-34226 cve-icon
https://www.cve.org/CVERecord?id=CVE-2026-34226 cve-icon
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CVSS Vulnerability Scoring System

Detailed values of each vector for above chart.
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Privileges Required
User Interaction
Scope
Confidentiality Impact
Integrity Impact
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