happy-dom vulnerabilities

Browse known CVEs and advisories by package and ecosystem. Severity tells you the worst case. What determines real risk is whether the vulnerable code actually runs in your applications.

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CVE-IDSeverityPackage summary

CVE-2026-34226Highhappy-dom: Happy DOM's fetch credentials include uses page-origin cookies instead of target-origin cookies CVE-2026-33943Highhappy-dom: Happy DOM ECMAScriptModuleCompiler: unsanitized export names are interpolated as executable code CVE-2025-62410Criticalhappy-dom: happy-dom's `--disallow-code-generation-from-strings` is not sufficient for isolating untrusted JavaScript CVE-2025-61927Criticalhappy-dom: Happy DOM: VM Context Escape can lead to Remote Code Execution CVE-2024-51757Criticalhappy-dom: happy-dom allows for server side code to be executed by a <script> tag

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