Technology · npm
happy-dom (npm) vulnerabilities
Updated . Rebuilt every hour.
Junglewise Threat Intelligence has tracked 5 vulnerabilities in happy-dom (npm): 0 in the last 7 days and 0 in the last 90 days, 0 of them critical and 0 exploited in the wild. The most recent, CVE-2026-34226, was published on 27 March 2026.
- Last 7 days
- 0
- Last 90 days
- 0
- Critical, all time
- 0
- Exploited in the wild
- 0
About happy-dom (npm)
A JavaScript implementation of a web browser without a graphical user interface, used for testing and web scraping.
Latest happy-dom (npm) vulnerabilities
- CVE-2026-34226: capricorn86 Happy DOM cookie leakage in fetch requestshighCVSS 7.5EPSS 0.6%
- CVE-2026-33943: capricorn86 Happy DOM code injection in ECMAScriptModuleCompilerhighCVSS 8.8EPSS 1.0%
- CVE-2025-62410: happy-dom prototype pollution allowing arbitrary code executionmediumCVSS 4EPSS 0.4%
- CVE-2025-61927: Happy DOM VM Context Escape leading to Remote Code ExecutionmediumCVSS 4EPSS 0.6%
- CVE-2024-51757: happy-dom server-side code execution via script tagmediumCVSS 4EPSS 0.8%
Most severe happy-dom (npm) vulnerabilities
Exploited in the wild first, then by severity and CVSS score.
- CVE-2026-33943: capricorn86 Happy DOM code injection in ECMAScriptModuleCompilerhighCVSS 8.8EPSS 1.0%
- CVE-2026-34226: capricorn86 Happy DOM cookie leakage in fetch requestshighCVSS 7.5EPSS 0.6%
- CVE-2024-51757: happy-dom server-side code execution via script tagmediumCVSS 4EPSS 0.8%
- CVE-2025-61927: Happy DOM VM Context Escape leading to Remote Code ExecutionmediumCVSS 4EPSS 0.6%
- CVE-2025-62410: happy-dom prototype pollution allowing arbitrary code executionmediumCVSS 4EPSS 0.4%
Vulnerabilities per week
The last 13 weeks, by the week each vulnerability was published.
| Week of | Bar | Vulns | Critical |
|---|---|---|---|
| 29 Jun 2026 | 0 | 0 | |
| 6 Jul 2026 | 0 | 0 | |
| 13 Jul 2026 | 0 | 0 | |
| 20 Jul 2026 | 0 | 0 | |
| 27 Jul 2026 | 0 | 0 | |
| 3 Aug 2026 | 0 | 0 | |
| 10 Aug 2026 | 0 | 0 | |
| 17 Aug 2026 | 0 | 0 | |
| 24 Aug 2026 | 0 | 0 | |
| 31 Aug 2026 | 0 | 0 | |
| 7 Sep 2026 | 0 | 0 | |
| 14 Sep 2026 | 0 | 0 | |
| 21 Sep 2026 | 0 | 0 |
How this is built
Junglewise Threat Intelligence collects vulnerabilities from NVD, GitHub Security Advisories, OSV, the CISA Known Exploited Vulnerabilities catalog, FIRST EPSS and vendor advisories, and matches each one to the technologies and vendors it affects. Dates are the date a vulnerability was published, in UTC.
The pages are rebuilt from the database every hour. Frozen weekly and monthly reports never change once published, so they can be cited.
Use this data
The same data is at https://junglewise.ai/threats/technologies/happy-dom.json, for scripts and language models. It is free to reuse under CC BY 4.0 with a link back to this page.
Cite as: Junglewise Threat Intelligence, "happy-dom (npm) vulnerabilities", https://junglewise.ai/threats/technologies/happy-dom, 26 September 2026.