Vulnerability library
Security checkNovember 14, 2025

Vega Cross-Site Scripting (XSS) via expressions abusing toString calls in environments using the VEGA_DEBUG global varia - vega-interpreter

Understand the exposure, see the recommended fix, and check whether your own website has related weaknesses.

High severitynpmvega-interpreter

Check your website

Find this and other vulnerabilities with a free scan.

Your scan runs on your computer. No account required.

Description

Applications meeting 2 conditions are at risk of arbitrary JavaScript code execution, even if “safe mode” expressionInterpreter is used.

  1. Use vega in an application that attaches vega library and a vega.View instance similar to the Vega Editor to the global window 2.

Recommendation

Update the vega-interpreter package to the latest compatible version. Followings are version details:

  • Affected version(s): **< 1.2.1 >= 2.0.0, < 2.2.1**
  • Patched version(s): **1.2.1 2.2.1**

References

Could your website be exposed too?

SmartScanner can check your website for Vega Cross-Site Scripting (XSS) via expressions abusing toString calls in environments using the VEGA_DEBUG global varia - vega-interpreter and gives you actionable findings to investigate.

Start a free scan

Related Issues

You might also like:

How to Secure your NodeJs Express Javascript Application - part 1

CSRF, XXE, and 12 Other Security Acronyms Explained

How do hackers hack websites?

See something that needs correcting? Let us knowUpdated November 14, 2025