CVE-2026-118250
Published:October 28, 2026
Updated:November 04, 2026
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.
Affected Packages
https://github.com/highcharts/highcharts.git (GITHUB):
Affected version(s) >=v6.1.0 <v13.1.0 || >=v7.0.0 <v13.1.0 || >=v8.0.0 <v13.1.0 || >=v9.0.0 <v13.1.0 || >=v10.0.0 <v13.1.0 || >=v11.0.0 <v13.1.0 || >=v12.0.0 <v13.1.0 || >=v13.0.0-beta.1 <v13.1.0 || >=v13.0.0 <v13.1.0Fix Suggestion:
Update to version v13.1.0highcharts (NPM):
Affected version(s) >=13.0.0 <13.1.0 || >=13.0.0-beta.0 <13.1.0Fix Suggestion:
Update to version 13.1.0highcharts (NPM):
Affected version(s) >=8.0.0 <11.4.9 || >=6.1.0 <11.4.9 || >=7.0.0 <11.4.9 || >=11.0.0 <11.4.9 || >=9.0.0 <11.4.9 || >=10.0.0 <11.4.9Fix Suggestion:
Update to version 11.4.9highcharts (NPM):
Affected version(s) >=12.0.0 <12.6.1Fix Suggestion:
Update to version 12.6.1highcharts (NPM):
Affected version(s) >=6.1.0 <11.4.9Fix Suggestion:
Update to version 11.4.9Additional Notes
The description of this vulnerability differs from MITRE.
Related Resources (7)
Do you need more information?
Contact UsCVSS v4
Base Score:
7.2
Attack Vector
NETWORK
Attack Complexity
LOW
Attack Requirements
NONE
Privileges Required
LOW
User Interaction
NONE
Vulnerable System Confidentiality
LOW
Vulnerable System Integrity
HIGH
Vulnerable System Availability
HIGH
Subsequent System Confidentiality
LOW
Subsequent System Integrity
LOW
Subsequent System Availability
LOW
CVSS v3
Base Score:
9.9
Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
LOW
User Interaction
NONE
Scope
CHANGED
Confidentiality
LOW
Integrity
HIGH
Availability
HIGH
Weakness Type (CWE)
Improperly Controlled Modification of Object Prototype Attributes
EPSS
Base Score:
0.36