cvedb.io
CVE-2026-34226
HIGH · CVSS 7.5
EPSS exploitation probability: 0%
Published 2026-03-27T22:16:23.113 · Last modified 2026-06-30T03:18:51.950

Summary

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.

Affected products

capricorn86 — happy_dom

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References

This product uses data from the NVD API but is not endorsed or certified by the NVD. Informational only; not professional security advice.