9.8

CVE-2026-33943

Exploit

Happy DOM ECMAScriptModuleCompiler: unsanitized export names are interpolated as executable code

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.
Daten sind bereitgestellt durch National Vulnerability Database (NVD)
Capricorn86 ≫ Happy Dom SwPlatformnode.js Version >= 15.10.0 < 20.8.8
Zu dieser CVE wurde keine Warnung gefunden.
EPSS Metriken
Typ Quelle Score Percentile
EPSS FIRST.org 0.79% 0.516
CVSS Metriken
Quelle Base Score Exploit Score Impact Score Vector String
NIST 9.8 3.9 5.9
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
security-advisories@github.com 8.8 2.8 5.9
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
0b0ca135-0b70-47e7-9f44-1890c2a1c46c 8.8 2.8 5.9
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
CWE-917 Improper Neutralization of Special Elements used in an Expression Language Statement ('Expression Language Injection')

The product constructs all or part of an expression language (EL) statement in a framework such as a Java Server Page (JSP) using externally-influenced input from an upstream component, but it does not neutralize or incorrectly neutralizes special elements that could modify the intended EL statement before it is executed.

CWE-94 Improper Control of Generation of Code ('Code Injection')

The product constructs all or part of a code segment using externally-influenced input from an upstream component, but it does not neutralize or incorrectly neutralizes special elements that could modify the syntax or behavior of the intended code segment.

https://github.com/capricorn86/happy-dom/commit/5437fdf8f13adb9590f9f52616d9f69c3ee8db3c
Patch
https://github.com/capricorn86/happy-dom/releases/tag/v20.8.8
Product
Release Notes
https://bugzilla.redhat.com/show_bug.cgi?id=2452522
https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-33943.json
https://github.com/capricorn86/happy-dom/security/advisories/GHSA-6q6h-j7hj-3r64
Vendor Advisory
Exploit
https://access.redhat.com/security/cve/CVE-2026-33943