CVE-2026-34226

Happy DOM's fetch credentials include uses page-origin cookies instead of target-origin cookies

CVSS 7.5 HIGHEPSS 0.4%CWE-201 CWE-359

Vexday Risk Score

21Bajo

Decisión SSVC (CISA)

Track

Sin señal de explotación → monitorear

CVSS 7.5EPSS 0.4%KEV nãoPoC —Nuclei —Metasploit —Patch —

Ciclo de vida

27 mar 2026Publicada en NVD

Recomendación: Monitorear — sin señal de explotación por ahora.

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.

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N

Productos afectados

capricorn86 · happy-dom

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Referencias

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