Bug 2563184 (CVE-2026-118660) - CVE-2026-118660 happy-dom: happy-dom: Server-Side Request Forgery via default loading of external resources
Summary: CVE-2026-118660 happy-dom: happy-dom: Server-Side Request Forgery via default...
Keywords:
Status: NEW
Alias: CVE-2026-118660
Product: Security Response
Classification: Other
Component: vulnerability
Version: unspecified
Hardware: All
OS: Linux
medium
medium
Target Milestone: ---
Assignee: Product Security DevOps Team
QA Contact:
URL:
Whiteboard:
Depends On: 2563397 2563399 2563400
Blocks:
TreeView+ depends on / blocked
 
Reported: 2026-10-28 20:32 UTC by OSIDB Bzimport
Modified: 2026-11-03 08:30 UTC (History)
8 users (show)

Fixed In Version:
Clone Of:
Environment:
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Description OSIDB Bzimport 2026-10-28 20:32:42 UTC 
Happy DOM is a JavaScript implementation of a web browser without its graphical user interface. Prior to 21.0.0, Happy DOM loads iframe src URLs and link rel="stylesheet" href URLs by default while parsing untrusted HTML on the server because disableIframePageLoading and disableCSSFileLoading default to false. An attacker who controls parsed HTML can therefore cause server-side requests to arbitrary internal or cloud endpoints without an application opt-in and may expose confidential responses or credentials returned by those endpoints. This issue is fixed in version 21.0.0.
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