CVE-2025-65026

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.
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 - () 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')