CVE-2026-118244 Highcharts JS - Stored XSS

Highcharts JS 12.0.0 to <12.6.1 and 13.1.0 contains a stored XSS caused by fallback to raw innerHTML assignment before allow-list filtering, letting attackers execute scripts during beforeprint event, exploit requires chart redraw on beforeprint.

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

Details

Type
Stored XSS
Impact
Stored XSS
CVSS vector
CVSS:4.0/AV:N/AC:L/AT:P/PR:L/UI:A/VC:H/VI:H/VA:N/SC:L/SI:L/SA:N/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-79

Vendor fix

Update to versions 12.6.1 or 13.1.0 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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