{"id":"CVE-2026-34226","revision":"0ab4aacf103b44f7b09dfa32dc1842a0","records":[{"revision":"0ab4aacf103b44f7b09dfa32dc1842a0","observedAt":"2026-10-27T09:03:00.507+00:00","statement":{"source":"nvd","id":"CVE-2026-34226","aliases":[],"title":"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(..., …","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.","state":0,"publishedAt":"2026-03-27T22:16:23.113+00:00","modifiedAt":"2026-10-26T21:10:00.17+00:00","affected":[],"metrics":[{"system":"CVSS 3.1 · security-advisories@github.com · Secondary","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N","score":7.5,"severity":"HIGH"},{"system":"CVSS 3.1 · 0b0ca135-0b70-47e7-9f44-1890c2a1c46c · Secondary","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N","score":7.5,"severity":"HIGH"}],"references":["https://github.com/capricorn86/happy-dom/blob/f8d8cad41e9722fab9eefb9dfb3cca696462e908/packages/happy-dom/src/fetch/utilities/FetchRequestHeaderUtility.ts","https://github.com/capricorn86/happy-dom/commit/68324c21d7b98f53f7bb5a7b3e185bda7106e751","https://github.com/capricorn86/happy-dom/pull/2117","https://github.com/capricorn86/happy-dom/releases/tag/v20.8.9","https://github.com/capricorn86/happy-dom/security/advisories/GHSA-w4gp-fjgq-3q4g","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"],"sourceUrl":"https://nvd.nist.gov/vuln/detail/CVE-2026-34226","license":"NIST NVD usage terms; underlying source attribution retained","enrichment":{"sourceStatus":"Modified","weaknesses":["CWE-201","CWE-359"],"productCriteria":["cpe:2.3:a:capricorn86:happy_dom:*:*:*:*:*:node.js:*:*"],"sourceDates":{"published":"2026-03-27T22:16:23.113","lastModified":"2026-10-26T21:10:00.170"},"relatedAdvisories":[],"note":"NVD analysis and CPE criteria are source context, not proof that a package or your environment is affected. Complete affected data, logical configurations and SSVC are retained in the original JSON."},"key":"nvd:CVE-2026-34226","identifiers":["CVE-2026-34226"]},"retained":false,"historicalAffected":[]}],"coverage":[]}