happy-dom
HighnpmCVE-2026-115895
What to do
Update happy-dom to 21.0.4 or later.
npm install happy-dom@21.0.4
A remote code execution flaw affects the npm package happy-dom. Affected versions: >= 17.0.0, <= 21.0.3. Fixed from version 21.0.4. CVSS score 8.8.
What the flaw allows: An attacker can make the service run their own code.
- Package
- happy-dom
- Ecosystem
- npm (JavaScript)
- Class
- Remote code execution
- Affected versions
- >= 17.0.0, <= 21.0.3
- CVSS
- 8.8
- Published on
- October 23, 2026
Sources
Entry built automatically from the cited security advisory, with no model rewriting. Acknowledged by the organisation or vendor, notified to an authority, or established by two independent sources.