CVEDB API

Vulnerabilities

Vulnerable Software

Vulnerability Details CVE-2026-33943

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.

Exploit prediction scoring system (EPSS) score

EPSS Score 0.01

EPSS Ranking 60.4%

CVSS Severity

CVSS v3 Score 8.8

References

Products affected by CVE-2026-33943

Capricorn86 » Happy Dom » Version: 15.10.0

cpe:2.3:a:capricorn86:happy_dom:15.10.0
Capricorn86 » Happy Dom » Version: 15.10.1

cpe:2.3:a:capricorn86:happy_dom:15.10.1
Capricorn86 » Happy Dom » Version: 15.10.2

cpe:2.3:a:capricorn86:happy_dom:15.10.2
Capricorn86 » Happy Dom » Version: 15.10.3

cpe:2.3:a:capricorn86:happy_dom:15.10.3
Capricorn86 » Happy Dom » Version: 15.10.4

cpe:2.3:a:capricorn86:happy_dom:15.10.4
Capricorn86 » Happy Dom » Version: 15.10.5

cpe:2.3:a:capricorn86:happy_dom:15.10.5
Capricorn86 » Happy Dom » Version: 15.10.6

cpe:2.3:a:capricorn86:happy_dom:15.10.6
Capricorn86 » Happy Dom » Version: 15.10.7

cpe:2.3:a:capricorn86:happy_dom:15.10.7
Capricorn86 » Happy Dom » Version: 15.10.8

cpe:2.3:a:capricorn86:happy_dom:15.10.8
Capricorn86 » Happy Dom » Version: 15.11.0

cpe:2.3:a:capricorn86:happy_dom:15.11.0
Capricorn86 » Happy Dom » Version: 15.11.1

cpe:2.3:a:capricorn86:happy_dom:15.11.1
Capricorn86 » Happy Dom » Version: 15.11.2

cpe:2.3:a:capricorn86:happy_dom:15.11.2
Capricorn86 » Happy Dom » Version: 15.11.3

cpe:2.3:a:capricorn86:happy_dom:15.11.3
Capricorn86 » Happy Dom » Version: 15.11.4

cpe:2.3:a:capricorn86:happy_dom:15.11.4
Capricorn86 » Happy Dom » Version: 15.11.5

cpe:2.3:a:capricorn86:happy_dom:15.11.5
Capricorn86 » Happy Dom » Version: 15.11.6

cpe:2.3:a:capricorn86:happy_dom:15.11.6
Capricorn86 » Happy Dom » Version: 15.11.7

cpe:2.3:a:capricorn86:happy_dom:15.11.7
Capricorn86 » Happy Dom » Version: 16.0.0

cpe:2.3:a:capricorn86:happy_dom:16.0.0
Capricorn86 » Happy Dom » Version: 16.0.1

cpe:2.3:a:capricorn86:happy_dom:16.0.1
Capricorn86 » Happy Dom » Version: 16.1.0

cpe:2.3:a:capricorn86:happy_dom:16.1.0
Capricorn86 » Happy Dom » Version: 16.2.0

cpe:2.3:a:capricorn86:happy_dom:16.2.0
Capricorn86 » Happy Dom » Version: 16.2.1

cpe:2.3:a:capricorn86:happy_dom:16.2.1
Capricorn86 » Happy Dom » Version: 16.2.2

cpe:2.3:a:capricorn86:happy_dom:16.2.2
Capricorn86 » Happy Dom » Version: 16.2.3

cpe:2.3:a:capricorn86:happy_dom:16.2.3
Capricorn86 » Happy Dom » Version: 16.2.4

cpe:2.3:a:capricorn86:happy_dom:16.2.4
Capricorn86 » Happy Dom » Version: 16.2.5

cpe:2.3:a:capricorn86:happy_dom:16.2.5
Capricorn86 » Happy Dom » Version: 16.2.6

cpe:2.3:a:capricorn86:happy_dom:16.2.6
Capricorn86 » Happy Dom » Version: 16.2.7

cpe:2.3:a:capricorn86:happy_dom:16.2.7
Capricorn86 » Happy Dom » Version: 16.2.8

cpe:2.3:a:capricorn86:happy_dom:16.2.8
Capricorn86 » Happy Dom » Version: 16.2.9

cpe:2.3:a:capricorn86:happy_dom:16.2.9
Capricorn86 » Happy Dom » Version: 16.3.0

cpe:2.3:a:capricorn86:happy_dom:16.3.0
Capricorn86 » Happy Dom » Version: 16.4.0

cpe:2.3:a:capricorn86:happy_dom:16.4.0
Capricorn86 » Happy Dom » Version: 16.4.1

cpe:2.3:a:capricorn86:happy_dom:16.4.1
Capricorn86 » Happy Dom » Version: 16.4.2

cpe:2.3:a:capricorn86:happy_dom:16.4.2
Capricorn86 » Happy Dom » Version: 16.4.3

cpe:2.3:a:capricorn86:happy_dom:16.4.3
Capricorn86 » Happy Dom » Version: 16.5.0

cpe:2.3:a:capricorn86:happy_dom:16.5.0
Capricorn86 » Happy Dom » Version: 16.5.1

cpe:2.3:a:capricorn86:happy_dom:16.5.1
Capricorn86 » Happy Dom » Version: 16.5.2

cpe:2.3:a:capricorn86:happy_dom:16.5.2
Capricorn86 » Happy Dom » Version: 16.5.3

cpe:2.3:a:capricorn86:happy_dom:16.5.3
Capricorn86 » Happy Dom » Version: 16.6.0

cpe:2.3:a:capricorn86:happy_dom:16.6.0
Capricorn86 » Happy Dom » Version: 16.7.0

cpe:2.3:a:capricorn86:happy_dom:16.7.0
Capricorn86 » Happy Dom » Version: 16.7.1

cpe:2.3:a:capricorn86:happy_dom:16.7.1
Capricorn86 » Happy Dom » Version: 16.7.2

cpe:2.3:a:capricorn86:happy_dom:16.7.2
Capricorn86 » Happy Dom » Version: 16.7.3

cpe:2.3:a:capricorn86:happy_dom:16.7.3
Capricorn86 » Happy Dom » Version: 16.8.0

cpe:2.3:a:capricorn86:happy_dom:16.8.0
Capricorn86 » Happy Dom » Version: 16.8.1

cpe:2.3:a:capricorn86:happy_dom:16.8.1
Capricorn86 » Happy Dom » Version: 17.0.0

cpe:2.3:a:capricorn86:happy_dom:17.0.0
Capricorn86 » Happy Dom » Version: 17.0.1

cpe:2.3:a:capricorn86:happy_dom:17.0.1
Capricorn86 » Happy Dom » Version: 17.0.2

cpe:2.3:a:capricorn86:happy_dom:17.0.2
Capricorn86 » Happy Dom » Version: 17.0.3

cpe:2.3:a:capricorn86:happy_dom:17.0.3
Capricorn86 » Happy Dom » Version: 17.0.4

cpe:2.3:a:capricorn86:happy_dom:17.0.4
Capricorn86 » Happy Dom » Version: 17.1.0

cpe:2.3:a:capricorn86:happy_dom:17.1.0
Capricorn86 » Happy Dom » Version: 17.1.1

cpe:2.3:a:capricorn86:happy_dom:17.1.1
Capricorn86 » Happy Dom » Version: 17.1.10

cpe:2.3:a:capricorn86:happy_dom:17.1.10
Capricorn86 » Happy Dom » Version: 17.1.11

cpe:2.3:a:capricorn86:happy_dom:17.1.11
Capricorn86 » Happy Dom » Version: 17.1.12

cpe:2.3:a:capricorn86:happy_dom:17.1.12
Capricorn86 » Happy Dom » Version: 17.1.13

cpe:2.3:a:capricorn86:happy_dom:17.1.13
Capricorn86 » Happy Dom » Version: 17.1.2

cpe:2.3:a:capricorn86:happy_dom:17.1.2
Capricorn86 » Happy Dom » Version: 17.1.3

cpe:2.3:a:capricorn86:happy_dom:17.1.3
Capricorn86 » Happy Dom » Version: 17.1.4

cpe:2.3:a:capricorn86:happy_dom:17.1.4
Capricorn86 » Happy Dom » Version: 17.1.5

cpe:2.3:a:capricorn86:happy_dom:17.1.5
Capricorn86 » Happy Dom » Version: 17.1.6

cpe:2.3:a:capricorn86:happy_dom:17.1.6
Capricorn86 » Happy Dom » Version: 17.1.7

cpe:2.3:a:capricorn86:happy_dom:17.1.7
Capricorn86 » Happy Dom » Version: 17.1.8

cpe:2.3:a:capricorn86:happy_dom:17.1.8
Capricorn86 » Happy Dom » Version: 17.1.9

cpe:2.3:a:capricorn86:happy_dom:17.1.9
Capricorn86 » Happy Dom » Version: 17.2.0

cpe:2.3:a:capricorn86:happy_dom:17.2.0
Capricorn86 » Happy Dom » Version: 17.2.1

cpe:2.3:a:capricorn86:happy_dom:17.2.1
Capricorn86 » Happy Dom » Version: 17.2.2

cpe:2.3:a:capricorn86:happy_dom:17.2.2
Capricorn86 » Happy Dom » Version: 17.2.3

cpe:2.3:a:capricorn86:happy_dom:17.2.3
Capricorn86 » Happy Dom » Version: 17.2.4

cpe:2.3:a:capricorn86:happy_dom:17.2.4
Capricorn86 » Happy Dom » Version: 17.3.0

cpe:2.3:a:capricorn86:happy_dom:17.3.0
Capricorn86 » Happy Dom » Version: 17.3.1

cpe:2.3:a:capricorn86:happy_dom:17.3.1
Capricorn86 » Happy Dom » Version: 17.3.2

cpe:2.3:a:capricorn86:happy_dom:17.3.2
Capricorn86 » Happy Dom » Version: 17.4.0

cpe:2.3:a:capricorn86:happy_dom:17.4.0
Capricorn86 » Happy Dom » Version: 17.4.1

cpe:2.3:a:capricorn86:happy_dom:17.4.1
Capricorn86 » Happy Dom » Version: 17.4.2

cpe:2.3:a:capricorn86:happy_dom:17.4.2
Capricorn86 » Happy Dom » Version: 17.4.3

cpe:2.3:a:capricorn86:happy_dom:17.4.3
Capricorn86 » Happy Dom » Version: 17.4.4

cpe:2.3:a:capricorn86:happy_dom:17.4.4
Capricorn86 » Happy Dom » Version: 17.4.5

cpe:2.3:a:capricorn86:happy_dom:17.4.5
Capricorn86 » Happy Dom » Version: 17.4.6

cpe:2.3:a:capricorn86:happy_dom:17.4.6
Capricorn86 » Happy Dom » Version: 17.4.7

cpe:2.3:a:capricorn86:happy_dom:17.4.7
Capricorn86 » Happy Dom » Version: 17.4.8

cpe:2.3:a:capricorn86:happy_dom:17.4.8
Capricorn86 » Happy Dom » Version: 17.4.9

cpe:2.3:a:capricorn86:happy_dom:17.4.9
Capricorn86 » Happy Dom » Version: 17.5.0

cpe:2.3:a:capricorn86:happy_dom:17.5.0
Capricorn86 » Happy Dom » Version: 17.5.1

cpe:2.3:a:capricorn86:happy_dom:17.5.1
Capricorn86 » Happy Dom » Version: 17.5.2

cpe:2.3:a:capricorn86:happy_dom:17.5.2
Capricorn86 » Happy Dom » Version: 17.5.3

cpe:2.3:a:capricorn86:happy_dom:17.5.3
Capricorn86 » Happy Dom » Version: 17.5.4

cpe:2.3:a:capricorn86:happy_dom:17.5.4
Capricorn86 » Happy Dom » Version: 17.5.5

cpe:2.3:a:capricorn86:happy_dom:17.5.5
Capricorn86 » Happy Dom » Version: 17.5.6

cpe:2.3:a:capricorn86:happy_dom:17.5.6
Capricorn86 » Happy Dom » Version: 17.5.7

cpe:2.3:a:capricorn86:happy_dom:17.5.7
Capricorn86 » Happy Dom » Version: 17.5.8

cpe:2.3:a:capricorn86:happy_dom:17.5.8
Capricorn86 » Happy Dom » Version: 17.5.9

cpe:2.3:a:capricorn86:happy_dom:17.5.9
Capricorn86 » Happy Dom » Version: 17.6.0

cpe:2.3:a:capricorn86:happy_dom:17.6.0
Capricorn86 » Happy Dom » Version: 17.6.1

cpe:2.3:a:capricorn86:happy_dom:17.6.1
Capricorn86 » Happy Dom » Version: 17.6.2

cpe:2.3:a:capricorn86:happy_dom:17.6.2
Capricorn86 » Happy Dom » Version: 17.6.3

cpe:2.3:a:capricorn86:happy_dom:17.6.3
Capricorn86 » Happy Dom » Version: 18.0.0

cpe:2.3:a:capricorn86:happy_dom:18.0.0
Capricorn86 » Happy Dom » Version: 18.0.1

cpe:2.3:a:capricorn86:happy_dom:18.0.1
Capricorn86 » Happy Dom » Version: 19.0.0

cpe:2.3:a:capricorn86:happy_dom:19.0.0
Capricorn86 » Happy Dom » Version: 19.0.1

cpe:2.3:a:capricorn86:happy_dom:19.0.1
Capricorn86 » Happy Dom » Version: 19.0.2

cpe:2.3:a:capricorn86:happy_dom:19.0.2
Capricorn86 » Happy Dom » Version: 20.0.0

cpe:2.3:a:capricorn86:happy_dom:20.0.0
Capricorn86 » Happy Dom » Version: 20.0.1

cpe:2.3:a:capricorn86:happy_dom:20.0.1
Capricorn86 » Happy Dom » Version: 20.0.10

cpe:2.3:a:capricorn86:happy_dom:20.0.10
Capricorn86 » Happy Dom » Version: 20.0.11

cpe:2.3:a:capricorn86:happy_dom:20.0.11
Capricorn86 » Happy Dom » Version: 20.0.2

cpe:2.3:a:capricorn86:happy_dom:20.0.2
Capricorn86 » Happy Dom » Version: 20.0.3

cpe:2.3:a:capricorn86:happy_dom:20.0.3
Capricorn86 » Happy Dom » Version: 20.0.4

cpe:2.3:a:capricorn86:happy_dom:20.0.4
Capricorn86 » Happy Dom » Version: 20.0.5

cpe:2.3:a:capricorn86:happy_dom:20.0.5
Capricorn86 » Happy Dom » Version: 20.0.6

cpe:2.3:a:capricorn86:happy_dom:20.0.6
Capricorn86 » Happy Dom » Version: 20.0.7

cpe:2.3:a:capricorn86:happy_dom:20.0.7
Capricorn86 » Happy Dom » Version: 20.0.8

cpe:2.3:a:capricorn86:happy_dom:20.0.8
Capricorn86 » Happy Dom » Version: 20.0.9

cpe:2.3:a:capricorn86:happy_dom:20.0.9
Capricorn86 » Happy Dom » Version: 20.1.0

cpe:2.3:a:capricorn86:happy_dom:20.1.0
Capricorn86 » Happy Dom » Version: 20.1.1

cpe:2.3:a:capricorn86:happy_dom:20.1.1
Capricorn86 » Happy Dom » Version: 20.2.0

cpe:2.3:a:capricorn86:happy_dom:20.2.0
Capricorn86 » Happy Dom » Version: 20.3.0

cpe:2.3:a:capricorn86:happy_dom:20.3.0
Capricorn86 » Happy Dom » Version: 20.3.1

cpe:2.3:a:capricorn86:happy_dom:20.3.1
Capricorn86 » Happy Dom » Version: 20.3.2

cpe:2.3:a:capricorn86:happy_dom:20.3.2
Capricorn86 » Happy Dom » Version: 20.3.3

cpe:2.3:a:capricorn86:happy_dom:20.3.3
Capricorn86 » Happy Dom » Version: 20.3.4

cpe:2.3:a:capricorn86:happy_dom:20.3.4
Capricorn86 » Happy Dom » Version: 20.3.5

cpe:2.3:a:capricorn86:happy_dom:20.3.5
Capricorn86 » Happy Dom » Version: 20.3.6

cpe:2.3:a:capricorn86:happy_dom:20.3.6
Capricorn86 » Happy Dom » Version: 20.3.7

cpe:2.3:a:capricorn86:happy_dom:20.3.7
Capricorn86 » Happy Dom » Version: 20.3.8

cpe:2.3:a:capricorn86:happy_dom:20.3.8
Capricorn86 » Happy Dom » Version: 20.3.9

cpe:2.3:a:capricorn86:happy_dom:20.3.9
Capricorn86 » Happy Dom » Version: 20.4.0

cpe:2.3:a:capricorn86:happy_dom:20.4.0
Capricorn86 » Happy Dom » Version: 20.5.0

cpe:2.3:a:capricorn86:happy_dom:20.5.0
Capricorn86 » Happy Dom » Version: 20.5.1

cpe:2.3:a:capricorn86:happy_dom:20.5.1
Capricorn86 » Happy Dom » Version: 20.5.2

cpe:2.3:a:capricorn86:happy_dom:20.5.2
Capricorn86 » Happy Dom » Version: 20.5.3

cpe:2.3:a:capricorn86:happy_dom:20.5.3
Capricorn86 » Happy Dom » Version: 20.5.4

cpe:2.3:a:capricorn86:happy_dom:20.5.4
Capricorn86 » Happy Dom » Version: 20.5.5

cpe:2.3:a:capricorn86:happy_dom:20.5.5
Capricorn86 » Happy Dom » Version: 20.6.0

cpe:2.3:a:capricorn86:happy_dom:20.6.0
Capricorn86 » Happy Dom » Version: 20.6.1

cpe:2.3:a:capricorn86:happy_dom:20.6.1
Capricorn86 » Happy Dom » Version: 20.6.2

cpe:2.3:a:capricorn86:happy_dom:20.6.2
Capricorn86 » Happy Dom » Version: 20.6.3

cpe:2.3:a:capricorn86:happy_dom:20.6.3
Capricorn86 » Happy Dom » Version: 20.6.4

cpe:2.3:a:capricorn86:happy_dom:20.6.4
Capricorn86 » Happy Dom » Version: 20.6.5

cpe:2.3:a:capricorn86:happy_dom:20.6.5
Capricorn86 » Happy Dom » Version: 20.7.0

cpe:2.3:a:capricorn86:happy_dom:20.7.0
Capricorn86 » Happy Dom » Version: 20.7.1

cpe:2.3:a:capricorn86:happy_dom:20.7.1
Capricorn86 » Happy Dom » Version: 20.7.2

cpe:2.3:a:capricorn86:happy_dom:20.7.2
Capricorn86 » Happy Dom » Version: 20.8.0

cpe:2.3:a:capricorn86:happy_dom:20.8.0
Capricorn86 » Happy Dom » Version: 20.8.1

cpe:2.3:a:capricorn86:happy_dom:20.8.1
Capricorn86 » Happy Dom » Version: 20.8.2

cpe:2.3:a:capricorn86:happy_dom:20.8.2
Capricorn86 » Happy Dom » Version: 20.8.3

cpe:2.3:a:capricorn86:happy_dom:20.8.3
Capricorn86 » Happy Dom » Version: 20.8.4

cpe:2.3:a:capricorn86:happy_dom:20.8.4
Capricorn86 » Happy Dom » Version: 20.8.5

cpe:2.3:a:capricorn86:happy_dom:20.8.5
Capricorn86 » Happy Dom » Version: 20.8.6

cpe:2.3:a:capricorn86:happy_dom:20.8.6
Capricorn86 » Happy Dom » Version: 20.8.7

cpe:2.3:a:capricorn86:happy_dom:20.8.7

Vulnerabilities

Vulnerable Software

Vulnerability Details CVE-2026-33943

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