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CVE-2026-118248 Details

Description

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.

Metrics

CVSS 3.x Severity and Vector Strings:

No CVSS 3.x data is available for this CVE.

References to Advisories, Solutions, and Tools

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URL	Source(s)	Tag(s)
https://github.com/highcharts/highcharts/commit/05efb9849130461fe61992ea8f58d22edaad978b	[email protected]
https://github.com/highcharts/highcharts/releases/tag/dashboards-v4.2.2	[email protected]
https://github.com/highcharts/highcharts/security/advisories/GHSA-wg5j-9wp8-2ggm	[email protected]

Weakness Enumeration

CWE-ID	CWE Name	Source
CWE-1321	Improperly Controlled Modification of Object Prototype Attributes ('Prototype Pollution')	[email protected]

Affected Products

No affected product data is available for this CVE.

Change History

2 change records found show changes

Date	Action	Recorded By
Oct 30, 2026	CVE Modified	CISA-ADP
Oct 28, 2026	New CVE Received	[email protected]