# CVE-2026-118246: Highcharts Core: `breadcrumbs.style` keys become SVG event-handler attributes

Status: published. Published: 2026-10-28. Updated: 2026-11-03.

Highcharts JS is a JavaScript charting library based on SVG. From 10.0.0 until 11.4.9, 12.6.1, and 13.1.0, Highcharts applies breadcrumbs.style as SVG attributes rather than CSS and does not filter the attribute names. An attacker who controls chart configuration can provide event-handler keys through drilldown.breadcrumbs, navigation.breadcrumbs, or hierarchical series breadcrumb options. The keys become active handlers on the breadcrumb button and execute in the hosting page origin after the user navigates to a level and hovers over or activates the button. Styled-mode charts do not apply this option and are not affected. This issue is fixed in 11.4.9, 12.6.1 and 13.1.0.

## Remediation

- fix: highcharts (npm): OSV reports a fixed version 11.4.9. Check the advisory for supported release branches. (source: OSV GHSA-35rr-xwfh-x789) — https://github.com/advisories/GHSA-35rr-xwfh-x789
- fix: highcharts (npm): OSV reports a fixed version 12.6.1. Check the advisory for supported release branches. (source: OSV GHSA-35rr-xwfh-x789) — https://github.com/advisories/GHSA-35rr-xwfh-x789
- fix: highcharts (npm): OSV reports a fixed version 13.1.0. Check the advisory for supported release branches. (source: OSV GHSA-35rr-xwfh-x789) — https://github.com/advisories/GHSA-35rr-xwfh-x789

## Affected products and versions

- highcharts / highcharts: >= 10.0.0, < 11.4.9 (affected); >= 12.0.0, < 12.6.1 (affected); >= 13.0.0, < 13.1.1 (affected). Source: CNA: GitHub_M
-  / highcharts (highcharts): ≥ 10.0.0; < 11.4.9 (affected, semver); OSV events: introduced 10.0.0; fixed 11.4.9. Source: OSV GHSA-35rr-xwfh-x789
-  / highcharts (highcharts): ≥ 12.0.0; < 12.6.1 (affected, semver); OSV events: introduced 12.0.0; fixed 12.6.1. Source: OSV GHSA-35rr-xwfh-x789
-  / highcharts (highcharts): ≥ 13.0.0; < 13.1.0 (affected, semver); OSV events: introduced 13.0.0; fixed 13.1.0. Source: OSV GHSA-35rr-xwfh-x789

## Severity and prioritization

- CVSS 4.0: 8.4 (high); CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:A/VC:H/VI:H/VA:N/SC:L/SI:L/SA:N; source: CNA: GitHub_M

- CISA KEV: No listing in collected sources

- EPSS: 0.34% as of 2026-11-02; percentile 27.15%

- SSVC: exploitation none; automatable no; technical impact total; source ADP: CISA-ADP

- Weaknesses: CWE-79

## Exploit evidence

No exploit evidence in collected sources. This is not proof of no exploitation.

## References

- https://github.com/highcharts/highcharts/security/advisories/GHSA-35rr-xwfh-x789 (CNA: GitHub_M; x_refsource_CONFIRM)

- https://github.com/highcharts/highcharts/commit/b0fafdaaee7d0cac2ecfeb0eaf37b11cd40594ef (CNA: GitHub_M; x_refsource_MISC)

- https://github.com/highcharts/highcharts/releases/tag/v13.1.0 (CNA: GitHub_M; x_refsource_MISC)

- https://github.com/advisories/GHSA-35rr-xwfh-x789 (OSV / GitHub Security Advisories; advisory)

- https://osv.dev/vulnerability/GHSA-35rr-xwfh-x789 (OSV / GitHub Security Advisories; osv)

## Provenance

- CNA: GitHub_M: https://www.cve.org/CVERecord?id=CVE-2026-118246; retrieved 2026-11-03; source updated 2026-11-03

- OSV / GitHub Security Advisories: https://osv.dev/vulnerability/GHSA-35rr-xwfh-x789; retrieved 2026-11-03; source updated 2026-10-28

- FIRST EPSS: https://api.first.org/data/v1/epss?cve=CVE-2026-118246; retrieved 2026-11-03; source updated Not reported

Revision: 4051b071ff85219b5848fd72a24b8f2c7e4b6abfb24143ffab27181be553627f

Canonical: https://y2.dev/cve/CVE-2026-118246

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