Arbitrary Code Injection Affecting @happy-dom/server-renderer package, versions <20.0.0
Threat Intelligence
Snyk has a proof-of-concept or detailed explanation of how to exploit this vulnerability.
The probability is the direct output of the EPSS model, and conveys an overall sense of the threat of exploitation in the wild. The percentile measures the EPSS probability relative to all known EPSS scores. Note: This data is updated daily, relying on the latest available EPSS model version. Check out the EPSS documentation for more details.
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Start learning- Snyk IDSNYK-JS-HAPPYDOMSERVERRENDERER-13535084
- published12 Oct 2025
- disclosed10 Oct 2025
- creditMas0nShi
Introduced: 10 Oct 2025
NewCVE-2025-61927 (opens in a new tab)How to fix?
Upgrade @happy-dom/server-renderer to version 20.0.0 or higher.
Overview
@happy-dom/server-renderer is an Use Happy DOM for server-side rendering (SSR) or as a static site generator (SSG).
Affected versions of this package are vulnerable to Arbitrary Code Injection due to default evaluation of code from strings. An attacker can execute arbitrary code on the host system by running untrusted JavaScript code that escapes the intended sandbox and gains access to process-level functionality. Additionally, if the process is executed with CommonJS, the attacker can get hold of the require() function to import modules.