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Bump happy-dom from 20.14.6 to 21.0.3 - #3154

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Bumps happy-dom from 20.14.6 to 21.0.3.

Release notes

Sourced from happy-dom's releases.

v21.0.3

👷‍♂️ Patch fixes

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

v21.0.2

👷‍♂️ Patch fixes

v21.0.1

👷‍♂️ Patch fixes

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
Commits
  • 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)
  • See full diff in compare view

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Summary by cubic

Updates happy-dom from 20.14.6 to 21.0.3. This major release disables CSS and iframe loading by default to fix a server-side request forgery (SSRF) vulnerability, and includes two additional server-renderer security fixes.

Migration

  • If stylesheet or iframe page loading is needed, set the new settings enableCSSFileLoading and enableIframePageLoading; disableCSSFileLoading is deprecated.

Written for commit 4d482cf. Summary will update on new commits.

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Bumps [happy-dom](https://github.com/capricorn86/happy-dom) from 20.14.6 to 21.0.3.
- [Release notes](https://github.com/capricorn86/happy-dom/releases)
- [Commits](capricorn86/happy-dom@v20.14.6...v21.0.3)

---
updated-dependencies:
- dependency-name: happy-dom
  dependency-version: 21.0.3
  dependency-type: direct:development
  update-type: version-update:semver-major
...

Signed-off-by: dependabot[bot] <support@github.com>
@dependabot
dependabot Bot requested a review from a team as a code owner October 20, 2026 08:47
@dependabot dependabot Bot added the dependencies Pull requests that update a dependency file label Oct 20, 2026
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dependabot Bot requested review from mtblz and witalisoft October 20, 2026 08:47
@dependabot dependabot Bot added the javascript Pull requests that update Javascript code label Oct 20, 2026
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