[dependabot]

Bumps happy-dom from 20.14.5 to 21.0.4.

Release notes

Sourced from happy-dom's releases.

v21.0.4

👷‍♂️ Patch fixes

• Fixed a code injection vulnerability in the ESM compiler - By @​capricorn86
• Fixed cross-origin isolation so opaque-origin data: iframes cannot access their parent or top window - By @​capricorn86

v21.0.3

👷‍♂️ Patch fixes

• Fixes security vulnerability where authorization header was forwarded when redirecting - By @​capricorn86

v21.0.2

👷‍♂️ Patch fixes

• Fixes SSRF security vulnerability by doing a target-origin bypass in the proxy server in @​happy-dom/server-renderer - By @​capricorn86

v21.0.1

👷‍♂️ Patch fixes

• Adds aliases --css and --iframe for enabling CSS and iframe loading to @​happy-dom/server-renderer - By @​capricorn86

v21.0.0

💣 Breaking Changes

• Disables CSS and IFrame loading by default to prevent server-side request forgery (SSRF) - By @​capricorn86
  • An attacker could embed <iframe> or <link rel="stylesheet"> elements in untrusted HTML to make Happy DOM send HTTP requests from the server to attacker-chosen URLs, including internal services. This could allow access to otherwise unreachable endpoints or trigger unintended actions, depending on the application and its network access.
  • The settings property disableCSSFileLoading has been deprecated
  • Added the new settings properties enableCSSFileLoading and enableIframePageLoading
  • If you don't believe that you are at risk, you can keep the same behavior as in <=v20.14.6 by sending in { enableCSSFileLoading: true, enableIframePageLoading: true } as broswer settings (e.g. new Window({ settings }));

v20.14.6

👷‍♂️ Patch fixes

• Fixes cookie scope forgery vulnerability - By @​capricorn86

Commits

• fd16352 fix: Fixed a code injection vulnerability in the ESM compiler (#2537)
• 75ab0fb fix: Fixed cross-origin isolation so opaque-origin data: iframes cannot acces...
• 875ef5c fix: Fixes security vulnerability where authorization header was forwarded wh...
• 1f3ffdf fix: Fixes SSRF security vulnerability by doing a target-origin bypass in the...
• f55c7e0 chore: Update security documentation (#2509)
• 2b91e68 fix: Adds alias for enabling CSS and iframe loading in server-renderer (#2503)
• 0a99c75 BREAKING CHANGE: Disables CSS and IFrame loading by default (#2502)
• f21dbd7 fix: Fixes cookie scope forgery vulnerability (#2477)
• See full diff in compare view

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Review	Status	Commit	Review trigger
📝 Code Review	✅ Completed 2026-10-26T16:18:26.471494Z	35756d5	PR opened

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