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CVE-2026-118250 Details

Description

Highcharts JS is a JavaScript charting library based on SVG. From 6.1.0 until 11.4.9, 12.6.1, and 3.1.0, Highcharts follows dot-separated series.keys paths without filtering each segment. An attacker who controls series.keys and matching point data can use a path through __proto__ to assign arbitrary named properties to Object.prototype. Those properties are visible to all JavaScript in the page, and no user interaction is required beyond rendering the chart. This issue is fixed in 11.4.9, 12.6.1, and 3.1.0.

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/fd4ee8140732618bbe71295aba55398fb1f8fa9e	[email protected]
https://github.com/highcharts/highcharts/pull/25313	[email protected]
https://github.com/highcharts/highcharts/releases/tag/v13.1.0	[email protected]
https://github.com/highcharts/highcharts/security/advisories/GHSA-rmqc-xvr3-v46c	[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
Nov 3, 2026	CVE Modified	CISA-ADP
Oct 28, 2026	New CVE Received	[email protected]