CVE-2026-86644

    Dashboard / Vulnerabilities / CVE-2026-86644

    CVE-2026-86644

    Published: 8 Sept 2026Last Modified: 10 Sept 2026

    Summary: star7th showdoc API Page Save Endpoint editormd.js cross site scripting

    Details: A vulnerability was determined in star7th showdoc up to 3.9.1. This vulnerability affects unknown code of the file web_src/public/editor.md/editormd.js of the component API Page Save Endpoint. Executing a manipulation can lead to cross site scripting. The attack may be launched remotely. The exploit has been publicly disclosed and may be utilized. Upgrading to version 3.9.2 is able to resolve this issue. This patch is called a8ea1520850b4242f395247f72e87e597506cef0. Upgrading the affected component is recommended. The vendor confirms: "The fix [...] sets Mermaid `securityLevel` to `strict`, disables `htmlLabels`, and sanitizes rendered SVG with DOMPurify."

    References: https://github.com/star7th/showdoc/, https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/86xxx/CVE-2026-86644.json, https://nvd.nist.gov/vuln/detail/CVE-2026-86644, https://vuldb.com/cve/CVE-2026-86644, https://vuldb.com/submit/906282, https://vuldb.com/vuln/399755, https://vuldb.com/vuln/399755/cti, https://github.com/star7th/showdoc/commit/a8ea1520850b4242f395247f72e87e597506cef0, https://github.com/star7th/showdoc/releases/tag/v3.9.2, https://gist.github.com/saDL0w/36a72a076e9ab24408a3d27582e778b2

    Affected packages

    Package

    Name:

    Purl:

    Affected ranges

    Type: GIT

    Events:

    Introduced- d9c786685d8b4ccdff00450303b523ed128cb871
    Fixed -a8ea1520850b4242f395247f72e87e597506cef0

    Affected versions

    3.9.0
    3.9.1

    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-2026-86644 | CVE-DB