# CVE-2026-118255: Highcharts Grid: javascript: URL in credits.href runs script on click

Status: published. Published: 2026-10-28. Updated: 2026-11-02.

Highcharts JS is a JavaScript charting library based on SVG. From 2.0.0 until 3.2.0, Highcharts Grid applies credits.href to the credits link without validating the URL scheme. An attacker who controls Grid configuration can provide a javascript URL, and activating the credits link runs script in the origin of the hosting page with access to that application's data and session state.This issue is fixed in Grid Pro 3.2.0.

## Remediation

- fix: @highcharts/dashboards (npm): OSV reports a fixed version 4.0.0. Check the advisory for supported release branches. (source: OSV GHSA-6hgp-fmhr-mrg4) — https://github.com/advisories/GHSA-6hgp-fmhr-mrg4
- fix: @highcharts/grid-pro (npm): OSV reports a fixed version 3.2.0. Check the advisory for supported release branches. (source: OSV GHSA-6hgp-fmhr-mrg4) — https://github.com/advisories/GHSA-6hgp-fmhr-mrg4

## Affected products and versions

- highcharts / highcharts: < 13.0.0-beta.2 (affected). Source: CNA: GitHub_M
- @highcharts / dashboards: >= 3.2.0, < 4.0.0 (affected). Source: CNA: GitHub_M
- @highcharts / grid-pro: >= 2.0.0, < 3.2.0 (affected). Source: CNA: GitHub_M
-  / @highcharts/dashboards (@highcharts/dashboards): ≥ 3.2.0; < 4.0.0 (affected, semver); OSV events: introduced 3.2.0; fixed 4.0.0. Source: OSV GHSA-6hgp-fmhr-mrg4
-  / @highcharts/grid-pro (@highcharts/grid-pro): ≥ 2.0.0; < 3.2.0 (affected, semver); OSV events: introduced 2.0.0; fixed 3.2.0. Source: OSV GHSA-6hgp-fmhr-mrg4

## 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: 0.35% as of 2026-11-02; percentile 28.48%

- SSVC: exploitation none; automatable no; technical impact partial; 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-6hgp-fmhr-mrg4 (CNA: GitHub_M; x_refsource_CONFIRM)

- https://github.com/highcharts/highcharts/pull/25351 (CNA: GitHub_M; x_refsource_MISC)

- https://github.com/highcharts/highcharts/commit/45b74403acafbe9f621c4a343506721d9129e991 (CNA: GitHub_M; x_refsource_MISC)

- https://github.com/highcharts/highcharts/releases/tag/grid-v3.2.0 (CNA: GitHub_M; x_refsource_MISC)

- https://github.com/advisories/GHSA-6hgp-fmhr-mrg4 (OSV / GitHub Security Advisories; advisory)

- https://osv.dev/vulnerability/GHSA-6hgp-fmhr-mrg4 (OSV / GitHub Security Advisories; osv)

## Provenance

- CNA: GitHub_M: https://www.cve.org/CVERecord?id=CVE-2026-118255; retrieved 2026-11-02; source updated 2026-11-02

- OSV / GitHub Security Advisories: https://osv.dev/vulnerability/GHSA-6hgp-fmhr-mrg4; retrieved 2026-11-02; source updated 2026-10-28

- FIRST EPSS: https://api.first.org/data/v1/epss?cve=CVE-2026-118255; retrieved 2026-11-02; source updated Not reported

Revision: 16e8437d14fba86ed50e6baef4c934ae5d61baf17750adea775811afec99fbe2

Canonical: https://y2.dev/cve/CVE-2026-118255

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