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    CVE-2026-64642

    Next.js is a React framework for building full-stack web applications. In versions 16.0.0 through 16.2.10, crafted requests targeting Next.js applications using App Router built with Turbopack and a single entry in config.i18n.locales can bypass middleware/proxy based authentication. This issue has been fixed in version 16.2.11.

    Published:Jul 27, 2026
    Last Modified:Jul 28, 2026
    EPS:Jul 27, 2026
    EPSS Score:0.01278
    CVSS Score:8.3

    Affected Products

    Vendor
    Vercel
    Product
    Next.js

    Exploits

    No exploit reference

    Common Weakness Enumeration

    CWE-285 Improper Authorization

    Related CVEs

    CVE-2026-75604 (CVSS 9) — Next.js is a React framework for building full-stack web applications. From 13.4.0 until 15.5.24 and 16.3.3, N…
    CVE-2026-64649 (CVSS 8.3) — Next.js is a React framework for building full-stack web applications. In versions 14.1.1 through 15.5.20 and …
    CVE-2026-64648 (CVSS 6) — Next.js is a React framework for building full-stack web applications. In versions 12.0.0 through 15.5.20 and …
    CVE-2026-64647 (CVSS 6.3) — Next.js is a React framework for building full-stack web applications. In versions 12.0.0 through 15.5.20 and …
    CVE-2026-64646 (CVSS 6.3) — Next.js is a React framework for building full-stack web applications. In versions 13.0.0 through 15.5.20 and …
    CVE-2026-64644 (CVSS 6.3) — Next.js is a React framework for building full-stack web applications. In versions 15.5.0 through 15.5.20 and …
    CVE-2026-64643 (CVSS 6.3) — Next.js is a React framework for building full-stack web applications. In versions 12.0.0 through 15.5.20 and …
    CVE-2026-64641 (CVSS 8.2) — Next.js is a React framework for building full-stack web applications. In versions 13.0.0 through 15.5.20 and …
    CVE-2026-64645 (CVSS 8.3) — Next.js is a React framework for building full-stack web applications. In versions 12.0.0 through 15.5.20 and …
    CVE-2026-45109 (CVSS 7.5) — Next.js is a React framework for building full-stack web applications. From 15.2.0 to before 15.5.18 and 16.2.…

    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