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  4. CVE 2026 118242 highcharts grid custom icon definition objects
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Back to active CVEs
High · CVSS 8.5CVE-2026-118242

Highcharts Grid: custom icon definition objects written with raw `setAttribute` on `<path>`CVE-2026-118242

Answer in brief

CVE-2026-118242 records a High severity (CVSS 8.5) vulnerability in Highcharts Grid: custom icon definition objects written with raw `setAttribute` on `<path>`. The current sources do not mark it as known exploited. The current feed maps @highcharts/grid-lite (generic), @highcharts/grid-pro (generic), highcharts/highcharts (generic). Check affected ranges and fixed versions before updating.

Analysis pending evidence review

HOL Guard separates source facts from reviewed analysis. See the methodology.

Published Oct 28, 2026Updated Oct 28, 2026Source checked Oct 28, 2026First seen by HOL Oct 28, 2026Material review Oct 28, 2026
Upstream Advisory

Key facts

Risk
High · CVSS 8.5
Exploitation
Not marked as known exploited
Affected software
3 mapped packages or products
Fix availability
Available

Why this deserves its current priority

CVSS is 8.5. The current sources do not mark it as known exploited. Treat this as a source-backed prioritization signal, not a statement about your environment.

Analysis status

Analysis pending evidence review

Factual feed record only; HOL analysis is not approved for indexing. Read the methodology.

Affected scope and exposure questions

The current feed maps @highcharts/grid-lite (generic), @highcharts/grid-pro (generic), highcharts/highcharts (generic). Check affected ranges and fixed versions before updating.

Mapped affected packages and fixed versions
PackageAffected rangeFixed version
@highcharts/grid-litegeneric>=2.3.0 <3.2.03.2.0
@highcharts/grid-progeneric>=2.3.0 <3.2.03.2.0
highcharts/highchartsgeneric<13.1.013.1.0

Recommended response

  1. 1Check inventory. Check lockfiles and deployed manifests for @highcharts/grid-lite, @highcharts/grid-pro, highcharts/highcharts.
  2. 2Review the reported fix. Update @highcharts/grid-lite to 3.2.0; @highcharts/grid-pro to 3.2.0; highcharts/highcharts to 13.1.0 if you use the affected versions. Test the change in a non-production environment first.

Evidence timeline and material changes

  1. Published upstream

    Oct 28, 2026

    Evidence: source:cvelist:source_dates:source-dates:record

  2. Source modified

    Oct 28, 2026

    Evidence: source:cvelist:source_dates:source-dates:record

  3. First seen by HOL

    Oct 28, 2026

Sources and claim methodology

  • GitHub security advisorygithub.com
  • GitHub security advisorygithub.com
Upstream source description

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.

Quoted source text, attributed separately from HOL analysis.

Related CVEs

  • Highcharts Core: `breadcrumbs.style` keys become SVG event-handler attributesSame highcharts/highcharts package
  • Highcharts Dashboards / Grid Pro: `DataTable.setCell` and column writers treat `__proto__` as an existing column.Same @highcharts/grid-pro package
  • Highcharts Dashboards: editableOptions.propertyPath writes to Object.prototypeSame highcharts/highcharts package
  • Highcharts: series column construction writes to Object.prototypeSame highcharts/highcharts package
  • Highcharts: dotted series.keys paths write to Object.prototypeSame highcharts/highcharts package
  • Highcharts: javascript: URL in credits.href runs script on clickSame highcharts/highcharts package

Record context

Vulnerability class
XSS
EPSS
Not reported
CWE IDs
CWE-79
Source
CVE List V5
Source checked
Oct 28, 2026
References
2 linked sources
Open source record