CVE-2023-26486: Vega-Functions Project Vega-Functions

Medium severity, CVSS 6.1. EPSS: 0.8% chance of exploitation in the next 30 days.

Vega is a visualization grammar, a declarative format for creating, saving, and sharing interactive visualization designs. The Vega `scale` expression function has the ability to call arbitrary functions with a single controlled argument. The scale expression function passes a user supplied argument group to getScale, which is then used as if it were an internal context. The context.scales[name].value is accessed from group and called as a function back in scale. This can be exploited to escape the Vega expression sandbox in order to execute arbitrary JavaScript. This issue has been fixed in version 5.13.1.

Affected products

• Vega-Functions Project Vega-Functions: before 5.13.1 (fixed in 5.13.1)
• Vega Project Vega: before 5.23.0 (fixed in 5.23.0)

Published 2023-03-04. Last modified 2026-06-17.