CVE-2026-33943

Published: Mar 27, 2026 Last Modified: Mar 27, 2026
ExploitDB:
Other exploit source:
Google Dorks:
HIGH 8,8
Source: [email protected]
Attack Vector: network
Attack Complexity: low
Privileges Required: none
User Interaction: required
Scope: unchanged
Confidentiality: high
Integrity: high
Availability: high

Description

AI Translation Available

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.

EPSS (Exploit Prediction Scoring System)

Trend Analysis

EPSS (Exploit Prediction Scoring System)

Prevede la probabilità di sfruttamento basata su intelligence sulle minacce e sulle caratteristiche della vulnerabilità.

EPSS Score
0,0008
Percentile
0,2th
Updated

EPSS Score Trend (Last 2 Days)

94

Improper Control of Generation of Code ('Code Injection')

Draft
Abstraction: Base Structure: Simple
Common Consequences
Security Scopes Affected:
Access Control Integrity Confidentiality Availability Non-Repudiation
Potential Impacts:
Bypass Protection Mechanism Gain Privileges Or Assume Identity Execute Unauthorized Code Or Commands Hide Activities
Applicable Platforms
Languages: Interpreted
Technologies: AI/ML
Likelihood of Exploit: Medium
View CWE Details
https://github.com/capricorn86/happy-dom/security/advisorie…
https://github.com/capricorn86/happy-dom/security/advisories/GHSA-6q6h-j7hj-3r64
https://github.com/capricorn86/happy-dom/commit/5437fdf8f13…
https://github.com/capricorn86/happy-dom/commit/5437fdf8f13adb9590f9f52616d9f69…
https://github.com/capricorn86/happy-dom/releases/tag/v20.8…
https://github.com/capricorn86/happy-dom/releases/tag/v20.8.8
https://github.com/capricorn86/happy-dom/security/advisorie…
https://github.com/capricorn86/happy-dom/security/advisories/GHSA-6q6h-j7hj-3r64