Highcharts Dashboards: `__proto__` data table id writes sync listeners to `Object.prototype`

影響: npm:@highcharts/dashboards >= 1.0.0, <= 4.2.1 → 4.2.2

The data cursor keeps its listener and state bookkeeping in plain objects keyed by data table id, so a table id of __proto__ supplied in the dataPool connector configuration resolves to Object.prototype when a sync registers its listeners, and the registration creates a property on Object.prototype named after the sync state and holding the internal listener array. The property name begins with a state prefix fixed by the library, to which the sync group option can append an attacker-chosen suf…

Read on GitHub Advisory Database

On 10/29/2026, 04:55 AM, GitHub Advisory Database published "Highcharts Dashboards: `__proto__` data table id writes sync listeners to `Object.prototype`" (type: Advisory). Severity is "Medium" (medium). Related technologies: JavaScript / Node.js. CVE: CVE-2026-118243.