CVE-2026-118250
Highcharts: dotted series.keys paths write to Object.prototype
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.
Fixes and workarounds
Fix
highcharts (npm): OSV reports a fixed version 12.6.1. Check the advisory for supported release branches.
Source: OSV GHSA-rmqc-xvr3-v46cFix
highcharts (npm): OSV reports a fixed version 13.1.0. Check the advisory for supported release branches.
Source: OSV GHSA-rmqc-xvr3-v46cFix
highcharts (npm): OSV reports a fixed version 11.4.9. Check the advisory for supported release branches.
Source: OSV GHSA-rmqc-xvr3-v46cAffected products and versions
| Product | Versions | Authority |
|---|---|---|
| highcharts highcharts |
>= 6.1.0, < 11.4.9 (affected) >= 12.0.0, < 12.6.1 (affected) >= 13.0.0, < 13.1.0 (affected) |
CNA: GitHub_M |
highchartshighcharts
npm |
≥ 12.0.0; < 12.6.1 (affected, semver); OSV events: introduced 12.0.0; fixed 12.6.1Source events (semver)Other versions: unaffected |
OSV GHSA-rmqc-xvr3-v46c |
highchartshighcharts
npm |
≥ 13.0.0; < 13.1.0 (affected, semver); OSV events: introduced 13.0.0; fixed 13.1.0Source events (semver)Other versions: unaffected |
OSV GHSA-rmqc-xvr3-v46c |
highchartshighcharts
npm |
≥ 6.1.0; < 11.4.9 (affected, semver); OSV events: introduced 6.1.0; fixed 11.4.9Source events (semver)Other versions: unaffected |
OSV GHSA-rmqc-xvr3-v46c |
Version ranges are source assertions. Check the vendor advisory and your installed configuration before determining exposure.
CVSS assessments
| Version / score | Vector | Authority |
|---|---|---|
| 4.0 / 7.2 high |
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 | CNA: GitHub_M |
Exploit evidence
No exploit evidence in collected sources. This is not proof of no exploitation.
References
- https://github.com/highcharts/highcharts/security/advisories/GHSA-rmqc-xvr3-v46cCNA: GitHub_M · x_refsource_CONFIRM
- https://github.com/highcharts/highcharts/pull/25313CNA: GitHub_M · x_refsource_MISC
- https://github.com/highcharts/highcharts/commit/fd4ee8140732618bbe71295aba55398fb1f8fa9eCNA: GitHub_M · x_refsource_MISC
- https://github.com/highcharts/highcharts/releases/tag/v13.1.0CNA: GitHub_M · x_refsource_MISC
- https://github.com/advisories/GHSA-rmqc-xvr3-v46cOSV / GitHub Security Advisories · advisory
- https://osv.dev/vulnerability/GHSA-rmqc-xvr3-v46cOSV / GitHub Security Advisories · osv
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