Highcharts JS up to 3.1.x Grid cross site scripting

Summaryinfo

A vulnerability, which was classified as problematic, has been found in Highcharts JS up to 3.1.x. This issue affects some unknown processing of the component Grid. The manipulation leads to cross site scripting. This vulnerability is referenced as CVE-2026-118242. Remote exploitation of the attack is possible. No exploit is available. It is advisable to upgrade the affected component.

Detailsinfo

A vulnerability was found in Highcharts JS up to 3.1.x and classified as problematic. This issue affects an unknown functionality of the component Grid. The manipulation with an unknown input leads to a cross site scripting vulnerability. Using CWE to declare the problem leads to CWE-79. The product does not neutralize or incorrectly neutralizes user-controllable input before it is placed in output that is used as a web page that is served to other users. Impacted is integrity. The summary by CVE is:

Highcharts JS is a JavaScript charting library based on SVG. From 2.3.0 until 3.2.0, Highcharts Grid creates SVG path elements from rendering.icons object definitions and previously copied every child key with setAttribute. An attacker who controls Grid configuration can supply event-handler attribute names in an icon definition. Because custom icons override built-ins, the attacker can replace default sort or pagination icons, and script runs in the hosting page origin when a user hovers over or activates the affected icon. This issue is fixed in 3.2.0.

It is possible to read the advisory at github.com. The identification of this vulnerability is CVE-2026-118242 since 10/27/2026. The exploitation is known to be easy. The attack may be initiated remotely. The exploitation requires an enhanced level of successful authentication. It demands that the victim is doing some kind of user interaction. The technical details are unknown and an exploit is not publicly available. The attack technique deployed by this issue is T1059.007 according to MITRE ATT&CK.

Upgrading to version 3.2.0 eliminates this vulnerability.

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Productinfo

Vendor

• Highcharts

Name

• JS

Version

• 3.0
• 3.1

CPE 2.3info

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CPE 2.2info

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