7.5
High
CVE-2026-118659 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 21.0.2, the Happy DOM server-renderer package's ServerRendererServer accepts unauthenticated HTTP/2 requests and resolves attacker-controlled :path values against server.targetOrigin in #onIncomingRequest in packages/@happy-dom/server-renderer/src/ServerRendererServer.ts without confirming that the resolved origin remains trusted before calling fetch. A protocol-relative path can change the destination to an arbitrary HTTP or HTTPS endpoint reachable by the server, including local and internal services, and the proxy relays the fetched response headers and body to the requester. This issue is fixed in version 21.0.2.
Affected products and versions
| Product | Affected versions | Fixed in |
|---|---|---|
| happy-dom 21.0 | earliest → < 21.0.2 | 21.0.2 |
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-2026-118660
Happy DOM is a JavaScript implementation of a web browser without its graphical user interface
8.6
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CVE-2026-115895
Happy DOM is a JavaScript implementation of a web browser without its graphical user interface
8.8
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CVE-2026-34226
Happy DOM is a JavaScript implementation of a web browser without its graphical user interface
7.5
High