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Vulnerabilities

Security fix · CVE-2026-118248

Highcharts Dashboards: editableOptions.propertyPath writes to Object.prototype

Published Oct 28, 2026 · catalog updated Oct 30, 2026 · Highcharts Dashboards: editableOptions.propertyPath writes

Last checked Nov 5, 2026. A connected source was read within the last 7 days.

Check if you run it

No confirmed exploitation is on record for CVE-2026-118248. EPSS is 0.28%. Act only if a listed version of Highcharts Dashboards: editableOptions.propertyPath writes is installed.

Gaps on this record

  • The stored product name is a package slug. The name on this page is taken from the title (Highcharts Dashboards: editableOptions.propertyPath writes).
  • No version range is stored. A customer cannot check an installed version against this record.
  • No vendor fix or required action is stored. Compare the linked advisory before you change production.
Severity
Medium6.9
Known exploitation
Not in CISA/VulnCheck KEV
EPSS
0.28%
Remediation
Advisory link
Affected products
vendor @highcharts dashboards · vendor highcharts highcharts

Highcharts JS is a JavaScript charting library based on SVG. From 1.0.0 until 4.2.2, Highcharts Dashboards edit mode walks editableOptions propertyPath segments without rejecting prototype-related keys. An attacker who controls editableOptions can provide a path through __proto__ or constructor, and a user's edit writes the configured value onto Object.prototype. The property then becomes visible to JavaScript throughout the page, with consequences determined by the consuming application. This issue is fixed in 4.2.2.

Are you affected?

Enter the version you run. The result uses only the ranges stored on this record.

The check returns affected, not affected, or incomplete. It does not guess a version that is missing from the record.

  • vendor @highcharts dashboardsversion unspecified
  • vendor highcharts highchartsversion unspecified

How to fix CVE-2026-118248

What to do

Three questions, each answered from this record only. Confirm the vendor advisory before you patch.

Should you patch?

No confirmed exploitation is on record for CVE-2026-118248. EPSS is 0.28%. Act only if a listed version of Highcharts Dashboards: editableOptions.propertyPath writes is installed.

Which versions are affected?

Affected version ranges are not on this record. Compare the installed version with the linked vendor advisory before you change production.

What should an analyst verify?

CWE-1321: Improperly Controlled Modification of Object Prototype Attributes (Prototype Pollution). EPSS 0.28%. There is no CISA KEV listing. No Exploit-DB or Metasploit reference is linked. Use the source links for the original advisory.

Code

The project this record applies to. Exploit listings stay in References.

Timeline

Detection, updates, and resolution for this record.

  1. Oct 28, 2026 · CIRCL Vulnerability Lookup

    Detected

    Highcharts JS is a JavaScript charting library based on SVG. From 1.0.0 until 4.2.2, Highcharts Dashboards edit mode walks editableOptions propertyPath segments without rejecting prototype-related keys. An attacker who controls editableOptions can provide a path through __proto__ or constructor, and a user's edit writes the configured value onto Object.prototype. The property then becomes visible

  2. Oct 30, 2026 · CIRCL Vulnerability Lookup

    Updated

    Highcharts JS is a JavaScript charting library based on SVG. From 1.0.0 until 4.2.2, Highcharts Dashboards edit mode walks editableOptions propertyPath segments without rejecting prototype-related keys. An attacker who controls editableOptions can provide a path through __proto__ or constructor, and a user's edit writes the configured value onto Object.prototype. The property then becomes visible

Sources

  • CIRCL Vulnerability LookupVulnerability recordCVE-2026-118248

    Highcharts JS is a JavaScript charting library based on SVG. From 1.0.0 until 4.2.2, Highcharts Dashboards edit mode walks editableOptions propertyPath segments without rejecting prototype-related keys. An attacker who controls editableOptions can provide a path through __proto__

    vulnerability.circl.lu
  • CVE.orgVulnerability recordCVE-2026-118248

    Official CVE identifier

    cve.org

References

Freshness

Last verified in this catalog Nov 5, 2026. Significant claims (KEV, EPSS, CVSS, affected ranges) come from the source rows above — open the original publisher for the authoritative advisory.

  • CVE.orgOct 30, 2026
  • CIRCL Vulnerability LookupOct 30, 2026