7.5High
CVE-2026-34226Happy DOM's fetch credentials include uses page-origin cookies instead of target-origin cookies
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.
Data: CVE.org, NVD, CISA KEV, FIRST EPSS, Ubuntu. Published as the sources state it, in English.
Affected products and versions
| Vendor | Product | Versions | |
|---|---|---|---|
| capricorn86 | happy-dom | < 20.8.9 | |
| Red Hat | Red Hat Ansible Automation Platform 2 | all versions | |
| Red Hat | Red Hat OpenShift Container Platform 4 | — |
References and patches
- https://github.com/capricorn86/happy-dom/security/advisories/GHSA-w4gp-fjgq-3q4g ExploitVendor Advisory
- https://github.com/capricorn86/happy-dom/pull/2117 Issue TrackingPatch
- https://github.com/capricorn86/happy-dom/commit/68324c21d7b98f53f7bb5a7b3e185bda7106e751 Patch
- https://github.com/capricorn86/happy-dom/blob/f8d8cad41e9722fab9eefb9dfb3cca696462e908/packages/happy-dom/src… Patch
- https://github.com/capricorn86/happy-dom/releases/tag/v20.8.9 ProductRelease Notes
- https://access.redhat.com/security/cve/CVE-2026-34226
- https://bugzilla.redhat.com/show_bug.cgi?id=2452519
- https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-34226.json
CPE matches (NVD) (1)
cpe:2.3:a:capricorn86:happy_dom:*:*:*:*:*:node.js:*:*< 20.8.9