Answer in brief
CVE-2026-118248 records a Medium severity (CVSS 6.9) vulnerability in Highcharts Dashboards: editableOptions.propertyPath writes to Object.prototype. The current sources do not mark it as known exploited. The current feed maps @highcharts/dashboards (generic), highcharts/highcharts (generic). Check affected ranges and fixed versions before updating.
Analysis pending evidence review
HOL Guard separates source facts from reviewed analysis. See the methodology.
CVSS is 6.9. The current sources do not mark it as known exploited. Treat this as a source-backed prioritization signal, not a statement about your environment.
Analysis status
Analysis pending evidence review
Factual feed record only; HOL analysis is not approved for indexing. Read the methodology.
The current feed maps @highcharts/dashboards (generic), highcharts/highcharts (generic). Check affected ranges and fixed versions before updating.
| Package | Affected range | Fixed version |
|---|---|---|
| @highcharts/dashboardsgeneric | >=1.0.0 <4.2.2 | 4.2.2 |
| highcharts/highchartsgeneric | <13.1.0 | 13.1.0 |
Published upstream
Oct 28, 2026
Evidence: source:cvelist:source_dates:source-dates:recordSource modified
Oct 28, 2026
Evidence: source:cvelist:source_dates:source-dates:recordFirst seen by HOL
Oct 28, 2026
Highcharts JS is a JavaScript charting library based on SVG. From 1.0.0 until 4.2.2, Highcharts Dashboards edit mode walks editableOptions propertyPath segments without rejecting prototype-related keys. An attacker who controls editableOptions can provide a path through __proto__ or constructor, and a user's edit writes the configured value onto Object.prototype. The property then becomes visible to JavaScript throughout the page, with consequences determined by the consuming application. This issue is fixed in 4.2.2.
Quoted source text, attributed separately from HOL analysis.