CVE-2026-118248

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    CVE-2026-118248

    Published: 28 Oct 2026Last Modified: 1 Nov 2026

    Summary: Highcharts Dashboards: editableOptions.propertyPath writes to Object.prototype

    Details: 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.

    References: https://github.com/highcharts/highcharts/releases/tag/dashboards-v4.2.2, https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/118xxx/CVE-2026-118248.json, https://github.com/highcharts/highcharts/security/advisories/GHSA-wg5j-9wp8-2ggm, https://nvd.nist.gov/vuln/detail/CVE-2026-118248, https://github.com/highcharts/highcharts/commit/05efb9849130461fe61992ea8f58d22edaad978b

    Affected packages

    Package

    Name:

    Purl:

    Affected ranges

    Type: GIT

    Events:

    Introduced- 0
    Fixed -5d3e905ce2e2c75c174c06cf8dee0f00a5e02841

    Affected versions

    v13.0.0
    v13.0.2
    v13.0.1

    Common Vulnerability Scoring System

    Attack Vector
    Network
    Adjacent
    Local
    Physical
    Privileges Required
    None
    Low
    High
    User Interaction
    None
    Required
    Scope
    Unchanged
    Changed
    Confidentiality
    None
    Low
    High
    Integrity
    None
    Low
    High
    Availability
    None
    Low
    High
    CVE-2026-118248 | CVE-DB