8.6
High
CVE-2026-118660 Happy DOM is a JavaScript implementation of a web browser without its graphical user interface
Description
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.
Affected products and versions
| Product | Affected versions | Fixed in |
|---|---|---|
| happy-dom 21.0 | earliest → < 21.0.0 | 21.0.0 |
References
- github.com github.com
- github.com github.com
- github.com github.com
- github.com github.com
Timeline
- Published
- Last modified
Other CVEs of happy-dom
The 9 CVEs of happy-dom →
CVE-2026-118661
Happy DOM is a JavaScript implementation of a web browser without its graphical user interface
6.5
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CVE-2026-118659
Happy DOM is a JavaScript implementation of a web browser without its graphical user interface
7.5
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CVE-2026-115895
Happy DOM is a JavaScript implementation of a web browser without its graphical user interface
8.8
High
CVE-2026-34226
Happy DOM is a JavaScript implementation of a web browser without its graphical user interface
7.5
High