CVE-2026-33943
happy-dom: Happy DOM: Remote Code Execution via JavaScript expression injection
Severidad por fuente
La etiqueta propia de Trivy es CRITICAL. Crítica según NVD. Más baja según GHSA (alta), Red Hat (alta).
Descripción
Happy DOM is a JavaScript implementation of a web browser without its graphical user interface. In versions 15.10.0 through 20.8.7, a code injection vulnerability in `ECMAScriptModuleCompiler` allows an attacker to achieve Remote Code Execution (RCE) by injecting arbitrary JavaScript expressions inside `export { }` declarations in ES module scripts processed by happy-dom. The compiler directly interpolates unsanitized content into generated code as an executable expression, and the quote filter does not strip backticks, allowing template literal-based payloads to bypass sanitization. Version 20.8.8 fixes the issue.
Paquetes afectados y versiones corregidas
| Fuente | Paquete | Corregido en |
|---|---|---|
| npm::GitHub Security Advisory npm | happy-dom | 20.8.8 |
| Red Hat | openshift4/ose-agent-installer-ui-rhel9 | sin corrección indicada |
Referencias
- https://access.redhat.com/security/cve/CVE-2026-33943
- https://bugzilla.redhat.com/show_bug.cgi?id=2452522
- https://github.com/capricorn86/happy-dom
- https://github.com/capricorn86/happy-dom/commit/5437fdf8f13adb9590f9f52616d9f69c3ee8db3c
- https://github.com/capricorn86/happy-dom/releases/tag/v20.8.8
- https://github.com/capricorn86/happy-dom/security/advisories/GHSA-6q6h-j7hj-3r64
- https://nvd.nist.gov/vuln/detail/CVE-2026-33943
- https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-33943.json