CVE-2026-118248
Severity not reportedHighcharts JS is a JavaScript charting library based on SVG.
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.
Affected products
Not reported by the source (unknown — not "none").
Weakness classification (CWE)
Source: NVD / CISA. “NVD-CWE-Other” and “NVD-CWE-noinfo” mean NVD could not assign a specific weakness.
Mitigation & advisories
No vendor advisory or patch reference tagged by NVD. Check the references below.
References
- https://github.com/highcharts/highcharts/commit/05efb9849130461fe61992ea8f58d22edaad978b security-advisories@github.com
- https://github.com/highcharts/highcharts/releases/tag/dashboards-v4.2.2 security-advisories@github.com
- https://github.com/highcharts/highcharts/security/advisories/GHSA-wg5j-9wp8-2ggm security-advisories@github.com