Cross-site scripting in highcharts - #VU152789
Published: September 29, 2026
Vulnerability identifier: #VU152789
CSH Severity: Low
CVSS v4: 5.1 [CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:P/VC:N/VI:N/VA:N/SC:L/SI:L/SA:N]
CVE-ID: N/A
CWE-ID: CWE-79
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vulnerability details
The vulnerability allows a remote user to execute arbitrary script in the origin of the page hosting the chart.
The vulnerability exists due to improper neutralization of event-handler attribute names in the breadcrumbs.style option when processing attacker-controlled chart configuration. A remote user can supply event-handler keys under breadcrumbs.style to execute arbitrary script in the origin of the page hosting the chart.
Exploitation requires breadcrumbs to render and a user to hover over or activate a breadcrumb button; charts rendered in styled mode are not affected.
Affected software
highcharts
Remediation
Install security update from vendor's website.
highcharts - addressed in versions 11.4.9, 12.6.1, 13.1.0