---
id: CVE-2026-116797
aliases:
  - GHSA-5ghw-9mgr-jvx2
title: >-
  Highcharts Grid Pro: cell-renderer `attributes` map written with raw
  `setAttribute`
summary: >-
  Highcharts Grid Pro: cell-renderer `attributes` map written with raw
  `setAttribute`
severity: high
cvss: 8.5
cwe:
  - CWE-79
vendor: highcharts
product: '@highcharts/grid-pro'
ecosystem: npm
affected:
  - '@highcharts/grid-pro >= 2.0.0, <= 3.1.0'
  - '@highcharts/dashboards = 3.6.0'
patched:
  - '@highcharts/grid-pro 3.2.0'
  - '@highcharts/dashboards 4.0.0'
published: '2026-10-28'
updated: '2026-10-28'
sourceUpdated: '2026-10-28T19:56:05Z'
source: GHSA
sourceUrl: 'https://github.com/advisories/GHSA-5ghw-9mgr-jvx2'
references:
  - url: >-
      https://github.com/highcharts/highcharts/security/advisories/GHSA-5ghw-9mgr-jvx2
  - url: 'https://nvd.nist.gov/vuln/detail/CVE-2026-116797'
  - url: >-
      https://github.com/highcharts/highcharts/commit/52abd4f8f8db87dd20eab7c01444112380e30e98
  - url: 'https://github.com/advisories/GHSA-5ghw-9mgr-jvx2'
tags:
  - ghsa
  - npm
  - cve.org
cvssVector: 'CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:P/VC:H/VI:H/VA:N/SC:L/SI:L/SA:N'
cvssSource: cna
ingestedAt: '2026-10-28T18:15:46.394Z'
---

## Overview

### Impact
The input-type cell renderers copy every entry of the renderer's `attributes` option onto the input or select element they create, without checking the attribute names. An attacker who controls the Grid configuration can supply entries under a column's `cells.renderer.attributes` or `cells.editMode.renderer.attributes` whose names are event handlers, and those handlers execute in the origin of the page hosting the Grid. A view renderer places the handler on the input rendered in every row of the column as soon as the Grid renders; an edit-mode renderer places it on the input created when a cell enters edit mode, and that input is focused immediately, so a `focus` handler runs as soon as the user starts editing. Exploitation requires that untrusted data reach the Grid configuration and that a user hover over or focus one of the rendered inputs, or begin editing a cell. The Pro DataGrid that shipped inside the Dashboards package is included.

### Workarounds

If your column configuration comes from a source you do not fully control, paste this snippet right after importing the `Grid` module:

```ts
const ALLOWED_RENDERER_ATTRIBUTES = [
    'autofocus', 'checked', 'max', 'maxlength', 'min', 'minlength',
    'multiple', 'pattern', 'placeholder', 'size', 'step'
];

const scrubColumn = (column) => {
    const cells = column?.cells;

    for (const renderer of [cells?.renderer, cells?.editMode?.renderer]) {
        const attributes = renderer?.attributes;

        if (attributes) {
            for (const key of Object.keys(attributes)) {
                if (!ALLOWED_RENDERER_ATTRIBUTES.includes(key.toLowerCase())) {
                    delete attributes[key];
                }
            }
        }
    }

    return column;
};

const scrubOptions = (options) => {
    scrubColumn(options?.columnDefaults);
    (options?.columns || []).forEach(scrubColumn);
    return options;
};

const proto = Grid.Grid.prototype;

const loadUserOptions = proto.loadUserOptions;
proto.loadUserOptions = function (options, ...rest) {
    scrubOptions(Grid.defaultOptions);
    return loadUserOptions.call(this, scrubOptions(options), ...rest);
};

const updateColumn = proto.updateColumn;
proto.updateColumn = function (columnId, options, ...rest) {
    return updateColumn.call(this, columnId, scrubColumn(options), ...rest);
};
```

### Obtaining the patched version
The patched releases are available from all the usual distribution channels. With npm, upgrade the affected package to the patched version listed above, for example `npm install @highcharts/grid-lite@3.2.0`. If you load Highcharts Grid from a CDN, use a versioned URL, for example `https://cdn.jsdelivr.net/npm/@highcharts/grid-lite@3.2.0/grid-lite.js`. For more on each installation method, see the [installation guide](https://www.highcharts.com/docs/grid/installation).

## Affected packages

- `@highcharts/grid-pro >= 2.0.0, <= 3.1.0`
- `@highcharts/dashboards = 3.6.0`

## Remediation

Upgrade to a patched release:

- `@highcharts/grid-pro 3.2.0`
- `@highcharts/dashboards 4.0.0`