Skip to main content
← All vulnerabilities
CVE-2026-118250GHSA-RMQC-XVR3-V46CEUVD-2026-112364

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

Published
Last modified
published
Not listed in CISA KEV
Fix
Fixed in 11.4.9, 12.6.1, 13.1.0
None on Exploit-DB, Metasploit or GitHub

Summary

Highcharts, a JavaScript charting library used in web pages, is affected. An attacker who can control chart series configuration and matching data can cause arbitrary properties to be added to Object.prototype, which then become visible to all JavaScript running on the page.

Summarized by anthropic/claude-haiku-5.5. Verify details against the original sources.

Read the original 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.

Timeline

  1. CVE published
  2. First seen by cve.now

Affected versions

  • highcharts highcharts

    From 6.1.0 · fixed in 11.4.9; From 12.0.0 · fixed in 12.6.1; From 13.0.0 · fixed in 13.1.0

  • highchartsnpm

    From 12.0.0 · fixed in 12.6.1

  • highchartsnpm

    From 13.0.0 · fixed in 13.1.0

  • highchartsnpm

    From 6.1.0 · fixed in 11.4.9

References 4

GitHub · highcharts/highcharts