Cross-site scripting in highcharts - #VU152787
Published: September 29, 2026
Vulnerability identifier: #VU152787
CSH Severity: Low
CVSS v4: 2.1 [CVSS:4.0/AV:N/AC:L/AT:P/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.
The vulnerability exists due to improper neutralization of javascript: URLs in the markup filter for xlink:href attributes when processing markup in text options. A remote user can supply chart configuration containing an SVG anchor with a javascript: xlink:href URL to execute arbitrary script.
Exploitation requires the chart output to be serialized and parsed again and a user to activate the link.
Affected software
highcharts
Remediation
Install security update from vendor's website.
highcharts - addressed in versions 11.4.9, 12.6.2, 13.1.1