Arbitrary Code Injection Affecting github.com/esm-dev/esm.sh/server package, versions >=0.0.0
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- published21 Nov 2025
- disclosed19 Nov 2025
- creditpyozzi-toss
Introduced: 19 Nov 2025
NewCVE-2025-65026 (opens in a new tab)Common Vulnerabilities and Exposures (CVE) are common identifiers for publicly known security vulnerabilities
Common Weakness Enumeration (CWE) is a category system for software weaknesses
How to fix?
A fix was pushed into the master branch but not yet published.
Overview
Affected versions of this package are vulnerable to Arbitrary Code Injection in the CSS-to-JavaScript module conversion feature. An attacker can execute arbitrary JavaScript code by injecting ${...} expressions into CSS files, which are then evaluated when the resulting JavaScript module is imported by victim applications.