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    CVE-2026-23869

    A denial of service vulnerability exists in React Server Components, affecting the following packages: react-server-dom-parcel, react-server-dom-turbopack and react-server-dom-webpack (versions 19.0.0 through 19.0.4, 19.1.0 through 19.1.5, and 19.2.0 through 19.2.4). The vulnerability is triggered by sending specially crafted HTTP requests to Server Function endpoints.The payload of the HTTP request causes excessive CPU usage for up to a minute ending in a thrown error that is catchable.

    Published:Apr 8, 2026
    Last Modified:Apr 13, 2026
    EPS:Apr 8, 2026
    EPSS Score:0.00322
    CVSS Score:7.5

    Affected Products

    Vendor
    Facebook
    Product
    React-server-dom-parcel
    Vendor
    Facebook
    Product
    React-server-dom-turbopack
    Vendor
    Facebook
    Product
    React-server-dom-webpack

    Exploits

    https://github.com/cybertechajju/CVE-2026-23869-Exploithttps://github.com/shaheryar773/mitigate-cve-2026-23869-react-server-component-loopshttps://github.com/yohannslm/CVE-2026-23869

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    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