CVE-2026-34226 (GCVE-0-2026-34226)

Vulnerability from cvelistv5 – Published: 2026-03-27 21:17 – Updated: 2026-03-31 14:25
VLAI?
Title
Happy DOM's fetch credentials include uses page-origin cookies instead of target-origin cookies
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.
Severity ?
7.5 (High)
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
CWE
  • CWE-201 - Insertion of Sensitive Information Into Sent Data
  • CWE-359 - Exposure of Private Personal Information to an Unauthorized Actor
Assigner
References
Impacted products
Vendor Product Version
capricorn86 happy-dom Affected: < 20.8.9
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Sightings

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Nomenclature

  • Seen: The vulnerability was mentioned, discussed, or observed by the user.
  • Confirmed: The vulnerability has been validated from an analyst's perspective.
  • Published Proof of Concept: A public proof of concept is available for this vulnerability.
  • Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
  • Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
  • Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
  • Not confirmed: The user expressed doubt about the validity of the vulnerability.
  • Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.



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