CVE-2026-116797: Highcharts Grid Pro: cell-renderer `attributes` map written with raw `setAttribute`
Highcharts JS is a JavaScript charting library based on SVG. From 2.0.0 until 3.2.0, Highcharts Grid Pro input renderers copy the cells.renderer.attributes and cells.editMode.renderer.attributes maps to input or select elements with raw setAttribute calls. An attacker who controls column configuration can add event-handler attributes to every rendered row or to the control created when a cell enters edit mode. Script then runs in the hosting page origin when a user hovers over or focuses an input or begins editing. This issue is fixed in Grid Pro 3.2.0.
Affected Software
Remediation
Recommended actions to resolve this vulnerability, in priority order.
- Upgrade
Upgrade
Highcharts Grid Proto a version that resolves this vulnerability.Fixed in 3.2.0
Event History
Frequently Asked Questions
Who is exposed to this issue?
Applications using Highcharts Grid Pro versions from 2.0.0 through versions before 3.2.0 are exposed if an attacker can control column configuration, including renderer attribute maps.
What does an attacker need to exploit it?
The attacker needs control of cells.renderer.attributes or cells.editMode.renderer.attributes in column configuration. They can supply event-handler attributes that are copied to rendered input or select elements.
When does malicious code execute?
Code executes in the hosting page's origin when a user hovers over or focuses an affected input, or when a cell enters edit mode and its control is created.
What version fixes the issue?
Grid Pro 3.2.0 fixes the issue.