#VU124843 Code Injection in handlebars.js - CVE-2026-33941
Published: April 2, 2026
Vulnerability identifier: #VU124843
Vulnerability risk: High
CVSSv4.0: CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:A/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:U/U:Amber
CVE-ID: CVE-2026-33941
CWE-ID: CWE-94
Exploitation vector: Local access
Exploit availability:
No public exploit available
Vulnerable software:
handlebars.js
handlebars.js
Software vendor:
The Handlebars Templating Language
The Handlebars Templating Language
Description
The vulnerability allows a local user to execute arbitrary JavaScript code.
The vulnerability exists due to improper neutralization of user-controlled input in the Handlebars CLI precompiler when generating JavaScript output from template file names and CLI options. A local user can supply specially crafted template names or option values to execute arbitrary JavaScript code.
The issue affects bin/handlebars and lib/precompiler.js through multiple injection points involving template names, namespace values, CommonJS paths, and AMD paths, and the injected code executes when the generated bundle is loaded in Node.js or a browser. User interaction is required to load the generated bundle.
Remediation
Install security update from vendor's website.