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
Configurations
No configuration.
History
20 Nov 2025, 15:17
| Type | Values Removed | Values Added |
|---|---|---|
| References | () https://github.com/esm-dev/esm.sh/security/advisories/GHSA-hcpf-qv9m-vfgp - |
19 Nov 2025, 18:15
| Type | Values Removed | Values Added |
|---|---|---|
| New CVE |
Information
Published : 2025-11-19 18:15
Updated : 2025-11-20 15:17
NVD link : CVE-2025-65026
Mitre link : CVE-2025-65026
CVE.ORG link : CVE-2025-65026
JSON object : View
Products Affected
No product.
CWE
CWE-94
Improper Control of Generation of Code ('Code Injection')
