CVE-2026-116796

Highcharts Core: `javascript:` URL in an `xlink:href` attribute survives text filtering and reaches exported charts

State: Published
Severity: 7.2 High
Published: Oct 28, 2026
Updated: Oct 29, 2026
Reserved: Oct 26, 2026

Description

Highcharts JS is a JavaScript charting library based on SVG. From 10.3.2 until 11.4.9, 12.6.2, and 13.1.1, Highcharts accepts an SVG anchor xlink:href attribute without applying the allowed-scheme check used for href and src. An attacker who controls a chart text option can preserve a javascript URL in serialized chart output. When exported or server-rendered SVG is parsed again and a user activates the link, script runs in the origin of that document. This issue is fixed in 11.4.9, 12.6.2 and 13.1.1.

Scores

CVSS	Score	Vector	Source
4.0	7.2 High	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	GitHub_M

Weaknesses

CWE-79 Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')

Affected Products

Product	Versions
highchartshighcharts	>= 10.3.2, < 11.4.9Affected >= 12.0.0, < 12.6.2Affected >= 13.0.0, < 13.1.1Affected

References

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