CVE-2026-118659 (GCVE-0-2026-118659)

Vulnerability from cvelistv5 – Published: 2026-10-28 20:20 – Updated: 2026-10-29 18:27
VLAI
Title
@happy-dom/server-renderer: ServerRendererServer Target-Origin Bypass SSRF / Open Proxy
Summary
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.
Severity
7.5 (High)
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
SSVC
Exploitation: poc Automatable: yes Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-10-29 18:27 UTC
CWE
  • CWE-918 - Server-Side Request Forgery (SSRF)
Assigner
GitHub_M CNA under the mitre root
CNA scorecard C 72/100 over 7978 records in the last 180 days details
References
Impacted products
Vendor Product Version CPE status
capricorn86 happy-dom Affected: < 21.0.2
guessed Create a notification for this product.
Show details on NVD website
To clipboard 

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