GHSA-8h8q-6873-q5fj

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    GHSA-8h8q-6873-q5fj

    Published: 11 May 2026Last Modified: 10 Sept 2026

    Summary: Next.js Vulnerable to Denial of Service with Server Components

    Details: A vulnerability affects certain React Server Components packages for versions 19.x and frameworks that use the affected packages, including Next.js 13.x, 14.x, 15.x, and 16.x using the App Router. The issue is tracked upstream as [CVE-2026-23870](https://github.com/facebook/react/security/advisories/GHSA-rv78-f8rc-xrxh). A specially crafted HTTP request can be sent to any App Router Server Function endpoint that, when deserialized, may trigger excessive CPU usage. This can result in denial of service in unpatched environments.

    References: https://github.com/facebook/react/security/advisories/GHSA-rv78-f8rc-xrxh, https://github.com/vercel/next.js/security/advisories/GHSA-8h8q-6873-q5fj, https://github.com/vitejs/vite-plugin-react/security/advisories/GHSA-w94c-4vhp-22gx, https://nvd.nist.gov/vuln/detail/CVE-2026-23870, https://github.com/vercel/next.js

    Affected packages

    Package

    Name: next

    Purl: pkg:npm/next

    Affected ranges

    Type: SEMVER

    Events:

    Introduced- 13.0.0
    Fixed -15.5.16

    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