High severity · published Oct 28, 2026
CVE-2026-118252
Highcharts Dashboards: sidebar component labels are parsed as HTML
New
8.4
CVSS
–
EPSS
No
On KEV
Description
Highcharts JS is a JavaScript charting library based on SVG. From 1.0.0 until 4.2.3, Highcharts Dashboards edit-mode sidebar parses component language strings as HTML rather than inserting them as text. An attacker who controls the Dashboards language configuration can provide markup containing event handlers, which execute in the hosting page origin when a user opens the edit-mode sidebar and the affected labels render. This issue is fixed in 4.2.3.
Exploitation
Is it being used?
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
DA
dashboards · @highcharts
>= 1.0.0, < 4.2.3 · source: vendor
HI
highcharts · highcharts
< 13.0.0-beta.2 · source: vendor
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2026-118252
CVE.org
https://www.cve.org/CVERecord?id=CVE-2026-118252
x_refsource_CONFIRM
https://github.com/highcharts/highcharts/security/advisories/GHSA-rcqf-f6h2-ccg9
x_refsource_MISC
https://github.com/highcharts/highcharts/commit/e65f8c21b9974dcccfa1c600a375d836acef4a7d
x_refsource_MISC
https://github.com/highcharts/highcharts/releases/tag/dashboards-v4.2.3
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