{"id":"GHSA-5ghw-9mgr-jvx2","summary":"Highcharts Grid Pro: cell-renderer `attributes` map written with raw `setAttribute`","details":"### Impact\nThe 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.\n\n### Workarounds\n\nIf your column configuration comes from a source you do not fully control, paste this snippet right after importing the `Grid` module:\n\n```ts\nconst ALLOWED_RENDERER_ATTRIBUTES = [\n    'autofocus', 'checked', 'max', 'maxlength', 'min', 'minlength',\n    'multiple', 'pattern', 'placeholder', 'size', 'step'\n];\n\nconst scrubColumn = (column) =\u003e {\n    const cells = column?.cells;\n\n    for (const renderer of [cells?.renderer, cells?.editMode?.renderer]) {\n        const attributes = renderer?.attributes;\n\n        if (attributes) {\n            for (const key of Object.keys(attributes)) {\n                if (!ALLOWED_RENDERER_ATTRIBUTES.includes(key.toLowerCase())) {\n                    delete attributes[key];\n                }\n            }\n        }\n    }\n\n    return column;\n};\n\nconst scrubOptions = (options) =\u003e {\n    scrubColumn(options?.columnDefaults);\n    (options?.columns || []).forEach(scrubColumn);\n    return options;\n};\n\nconst proto = Grid.Grid.prototype;\n\nconst loadUserOptions = proto.loadUserOptions;\nproto.loadUserOptions = function (options, ...rest) {\n    scrubOptions(Grid.defaultOptions);\n    return loadUserOptions.call(this, scrubOptions(options), ...rest);\n};\n\nconst updateColumn = proto.updateColumn;\nproto.updateColumn = function (columnId, options, ...rest) {\n    return updateColumn.call(this, columnId, scrubColumn(options), ...rest);\n};\n```\n\n### Obtaining the patched version\nThe 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).","aliases":["CVE-2026-116797"],"modified":"2026-10-28T20:15:05.434231493Z","published":"2026-10-28T19:56:02Z","database_specific":{"nvd_published_at":"2026-10-28T18:17:14Z","cwe_ids":["CWE-79"],"severity":"HIGH","github_reviewed":true,"github_reviewed_at":"2026-10-28T19:56:02Z"},"references":[{"type":"WEB","url":"https://github.com/highcharts/highcharts/security/advisories/GHSA-5ghw-9mgr-jvx2"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-116797"},{"type":"WEB","url":"https://github.com/highcharts/highcharts/commit/52abd4f8f8db87dd20eab7c01444112380e30e98"},{"type":"PACKAGE","url":"https://github.com/highcharts/highcharts"}],"affected":[{"package":{"name":"@highcharts/grid-pro","ecosystem":"npm","purl":"pkg:npm/%40highcharts/grid-pro"},"ranges":[{"type":"SEMVER","events":[{"introduced":"2.0.0"},{"fixed":"3.2.0"}]}],"database_specific":{"last_known_affected_version_range":"\u003c= 3.1.0","source":"https://github.com/github/advisory-database/blob/main/advisories/github-reviewed/2026/10/GHSA-5ghw-9mgr-jvx2/GHSA-5ghw-9mgr-jvx2.json"}},{"package":{"name":"@highcharts/dashboards","ecosystem":"npm","purl":"pkg:npm/%40highcharts/dashboards"},"ranges":[{"type":"SEMVER","events":[{"introduced":"3.6.0"},{"fixed":"4.0.0"}]}],"versions":["3.6.0"],"database_specific":{"source":"https://github.com/github/advisory-database/blob/main/advisories/github-reviewed/2026/10/GHSA-5ghw-9mgr-jvx2/GHSA-5ghw-9mgr-jvx2.json"}}],"schema_version":"1.9.2","severity":[{"type":"CVSS_V4","score":"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"}]}