CVE-2026-118249

high

Description

Highcharts JS is a JavaScript charting library based on SVG. From 13.0.0 until 13.1.0, Highcharts builds series data columns by using point option keys directly as column IDs. Own enumerable __proto__ and constructor keys from parsed point objects can therefore direct integer-indexed writes to Object.prototype or the Object constructor. The inherited values affect reads and for-in enumeration across the page and can disrupt rendering or alter consuming application behavior without user interaction beyond rendering the chart. This issue is fixed in 13.1.0.

References

https://github.com/highcharts/highcharts/security/advisories/GHSA-gfvx-2c2g-38wq

https://github.com/highcharts/highcharts/releases/tag/v13.1.0

https://github.com/highcharts/highcharts/pull/25321

https://github.com/highcharts/highcharts/commit/d3357705c8f348904441327e32f50ab528c3a205

https://euvd.enisa.europa.eu/vulnerability/EUVD-2026-112363

Details

Source: Mitre, NVD

Published: 2026-10-28

Updated: 2026-10-29

Risk Information

CVSS v2

Base Score: 7.5

Vector: CVSS2#AV:N/AC:L/Au:N/C:P/I:P/A:P

Severity: High

CVSS v3

Base Score: 9.8

Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Severity: Critical

CVSS v4

Base 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

Severity: High

EPSS

EPSS: 0.00363