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    CVE-2026-116688

    CKEditor 5 is a modern JavaScript rich-text editor with an MVC architecture. From 45.0.0 until 47.7.4 and 48.5.1, the engine uses a vulnerable es-toolkit version whose prototype-pollution behavior can be reached while CKEditor processes incoming style attribute values. Crafted editor content can thereby cause unauthorized JavaScript execution in the browser. This issue is fixed in versions 47.7.4 and 48.5.1.

    Published:Oct 27, 2026
    Last Modified:Oct 27, 2026
    EPS:Oct 27, 2026
    EPSS Score:
    CVSS Score:8.1

    Affected Products

    Vendor
    Ckeditor
    Product
    Ckeditor5

    Exploits

    No exploit reference

    Related CVEs

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    CVE-2025-25299 (CVSS 2.3) — CKEditor 5 is a modern JavaScript rich-text editor with an MVC architecture. During a recent internal audit, a…
    CVE-2024-45613 (CVSS 5.1) — CKEditor 5 is a JavaScript rich-text editor. Starting in version 40.0.0 and prior to version 43.1.1, a Cross-S…
    CVE-2021-21254 (CVSS 6.5) — CKEditor 5 is an open source rich text editor framework with a modular architecture. The CKEditor 5 Markdown p…

    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