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-expression

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High severitynpmvega-expression

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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-expression package to the latest compatible version. Followings are version details:

  • Affected version(s): **< 5.2.1 >= 6.0.0, < 6.1.0**
  • Patched version(s): **5.2.1 6.1.0**

References

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