Riskcovery

CVE-2026-118250

Highcharts: dotted series.keys paths write to Object.prototype

State
Published
Severity
7.2 High
Published
Oct 28, 2026
Updated
Oct 28, 2026
Reserved
Oct 27, 2026

Read the record on cve.org

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.

Scores

CVSSScoreVectorSource
4.07.2 HighCVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:L/VI:H/VA:H/SC:L/SI:L/SA:LGitHub_M

Weaknesses

  • CWE-1321 Improperly Controlled Modification of Object Prototype Attributes ('Prototype Pollution')

Affected Products

ProductVersions
highchartshighcharts
  • >= 6.1.0, < 11.4.9Affected
  • >= 12.0.0, < 12.6.1Affected
  • >= 13.0.0, < 13.1.0Affected

References

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