GHSA-c8x8-7fp4-3x9w

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    GHSA-c8x8-7fp4-3x9w

    Published: 5 Oct 2026Last Modified: 5 Oct 2026

    Summary: ProseMirror has a XSS vulnerability in prosemirror-view's paste handling

    Details: ### Impact When a user pastes attacker-provided HTML into a ProseMirror editor component, this can cause attacker-controlled JavaScript code to run in the browser window containing the editor. ### Patches Version 1.42.3 adds validation that prevents this attack. ### Workarounds No known workarounds.

    References: https://github.com/ProseMirror/prosemirror-view/security/advisories/GHSA-c8x8-7fp4-3x9w, https://nvd.nist.gov/vuln/detail/CVE-2026-104847, https://github.com/ProseMirror/prosemirror-view/commit/20dc0a911a79f8fc6640dbbea5e7d68d3c4784b7, https://github.com/ProseMirror/prosemirror-view/commit/2e91a612bbc1248e55b4f6061fc93fe459f977c1, https://github.com/ProseMirror/prosemirror-view

    Affected packages

    Package

    Name: prosemirror-view

    Purl: pkg:npm/prosemirror-view

    Affected ranges

    Type: SEMVER

    Events:

    Introduced- 0
    Fixed -1.42.3

    Affected versions

    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
    GHSA-c8x8-7fp4-3x9w | CVE-DB