CVE-2026-118250 Highcharts JS - Prototype Pollution

Highcharts JS 6.1.0 to 11.4.9, 12.6.1, and 3.1.0 contains a prototype pollution caused by unfiltered dot-separated series.keys paths, letting attackers assign arbitrary properties to Object.prototype without user interaction.

CVSS base score 7.2 /10
High
CISA KEV
Not listed
Public exploit
None known
Authentication
Required
View the NVD record ↗

Details

Type
Prototype Pollution
Impact
Data Tampering
CVSS 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/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
Published
28 October 2026
Updated
29 October 2026
Weakness
CWE-1321

Vendor fix

Update to versions 11.4.9, 12.6.1, or 3.1.0 or later.

Patching closes this CVE. It does not tell you which of your systems run the affected version, or what else is exposed alongside them.

References

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