FKIE_CVE-2025-65026

Vulnerability from fkie_nvd - Published: 2025-11-19 18:15 - Updated: 2026-01-15 17:53
Severity ?
6.1 (Medium) - CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N
9.6 (Critical) - CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:H/I:H/A:H
Summary
esm.sh is a nobuild content delivery network(CDN) for modern web development. Prior to version 136, The esm.sh CDN service contains a Template Literal Injection vulnerability (CWE-94) in its CSS-to-JavaScript module conversion feature. When a CSS file is requested with the ?module query parameter, esm.sh converts it to a JavaScript module by embedding the CSS content directly into a template literal without proper sanitization. An attacker can inject malicious JavaScript code using ${...} expressions within CSS files, which will execute when the module is imported by victim applications. This enables Cross-Site Scripting (XSS) in browsers and Remote Code Execution (RCE) in Electron applications. This issue has been patched in version 136.
References
security-advisories@github.comhttps://github.com/esm-dev/esm.sh/commit/87d2f6497574bf4448641a5527a3ac2beba5fd6cPatch
security-advisories@github.comhttps://github.com/esm-dev/esm.sh/security/advisories/GHSA-hcpf-qv9m-vfgpExploit, Vendor Advisory
134c704f-9b21-4f2e-91b3-4a467353bcc0https://github.com/esm-dev/esm.sh/security/advisories/GHSA-hcpf-qv9m-vfgpExploit, Vendor Advisory
Impacted products
Vendor Product Version
esm esm.sh *
To clipboard 

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  "id": "CVE-2025-65026",
  "lastModified": "2026-01-15T17:53:57.380",
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