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.
Published: 2026-10-28
Score: 7.2 High
EPSS: < 1% Very Low
KEV: No
Impact: n/a
Action: n/a
AI Analysis

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Remediation

No vendor fix or workaround currently provided.

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Tracking

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Advisories
Source ID Title
Github GHSA Github GHSA GHSA-rmqc-xvr3-v46c Highcharts: dotted series.keys paths write to Object.prototype
History

Tue, 03 Nov 2026 14:30:00 +0000

Type Values Removed Values Added
Metrics ssvc

{'options': {'Automatable': 'no', 'Exploitation': 'none', 'Technical Impact': 'total'}, 'version': '2.0.3'}


Wed, 28 Oct 2026 19:30:00 +0000

Type Values Removed Values Added
First Time appeared Highcharts
Highcharts highcharts
Vendors & Products Highcharts
Highcharts highcharts

Wed, 28 Oct 2026 18:15:00 +0000

Type Values Removed Values Added
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.
Title Highcharts: dotted series.keys paths write to Object.prototype
Weaknesses CWE-1321
References
Metrics cvssV4_0

{'score': 7.2, 'vector': 'CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:L/VI:H/VA:H/SC:L/SI:L/SA:L'}


Subscriptions

Highcharts Highcharts
cve-icon MITRE

Status: PUBLISHED

Assigner: GitHub_M

Published:

Updated: 2026-11-03T13:14:06.636Z

Reserved: 2026-10-27T20:13:55.313Z

Link: CVE-2026-118250

cve-icon Vulnrichment

Updated: 2026-11-03T13:13:55.596Z

cve-icon NVD

Status : Awaiting Analysis

Published: 2026-10-28T18:17:16.543

Modified: 2026-11-03T13:17:21.223

Link: CVE-2026-118250

cve-icon Redhat

No data.

cve-icon OpenCVE Enrichment

Updated: 2026-10-28T19:45:07Z

Weaknesses