VDB
CVE-2026-33943
CVE-2026-33943
PUBLISHED
CVSS 8.800000190734863 HIGH
Happy DOM ECMAScriptModuleCompiler: unsanitized export names are interpolated as executable code
EPSS 0.09% · 24.7th percentile
Risk Scores
CVSS 3.1
8.800000190734863
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
EPSS Score
0.09%
24.7th percentile
Affected Products
| Vendor | Product | Versions |
|---|---|---|
| capricorn86 | happy-dom | >= 15.10.0, < 20.8.8, >= 15.10.0, < 20.8.8, >= 15.10.0, < 20.8.8 |
| npm | happy-dom | 15.10.0, 15.10.0, 15.10.0 |
| capricorn86 | happy_dom | 15.10.0 |
Exploit Intelligence
- CIRCL seen: CVE-2026-33943 (circl-sighting)
- CIRCL seen: CVE-2026-33943 (circl-sighting)
- https://github.com/capricorn86/happy-dom/security/advisories/GHSA-6q6h-j7hj-3r64 (nist-nvd)
- CIRCL seen: CVE-2026-33943 (circl-sighting)
- CIRCL seen: CVE-2026-33943 (circl-sighting)
- https://github.com/capricorn86/happy-dom/releases/tag/v20.8.8 (circl)
- https://github.com/capricorn86/happy-dom/commit/5437fdf8f13adb9590f9f52616d9f69c3ee8db3c (circl)
- CVE-2026-33943.yml (github-poc)
- CVE-2026-33943.yml (github-poc)
- CVE-2026-33943.yml (github-poc)
…and 3 more exploits
Timeline
- Mar 26, 2026 CVE Published
- Mar 27, 2026 Security Advisory
- Mar 27, 2026 PoC Published
- Mar 27, 2026 PoC Published
- Mar 27, 2026 PoC Published
- Mar 28, 2026 EPSS Score
- Mar 30, 2026 CVE Updated
- Apr 13, 2026 PoC Published
- May 18, 2026 EPSS Score
- May 19, 2026 EPSS Score
- May 20, 2026 EPSS Score
- May 21, 2026 EPSS Score
References
- https://github.com/capricorn86/happy-dom/security/advisories/GHSA-6q6h-j7hj-3r64 url
- https://github.com/capricorn86/happy-dom/commit/5437fdf8f13adb9590f9f52616d9f69c3ee8db3c url
- https://github.com/capricorn86/happy-dom/releases/tag/v20.8.8 url
- https://github.com/capricorn86/happy-dom package
- https://nvd.nist.gov/vuln/detail/CVE-2026-33943 advisory