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.

The version of Next.js installed on the remote host is 12.0.0 prior to 15.5.21 or 16.0.0 prior to 16.2.11. It is, therefore, affected by multiple vulnerabilities:

- A Server-Side Request Forgery vulnerability in rewrites via an attacker-controlled destination hostname. (CVE-2026-64645)

- A Server-Side Request Forgery vulnerability in Server Actions on custom servers. This issue only affects versions 14.1.1 and later. (CVE-2026-64649)

- A Middleware / Proxy bypass in App Router applications using Turbopack and a single locale. This issue only affects versions 16.0.0 and later. (CVE-2026-64642)

- A denial of service vulnerability in App Router applications using Server Actions. This issue only affects versions 13.0.0 and later. (CVE-2026-64641)

- A denial of service vulnerability due to unbounded Server Action payloads in the Edge runtime. This issue only affects versions 13.0.0 and later. (CVE-2026-64646)

- A denial of service vulnerability in the Image Optimization API using SVGs. This issue only affects versions 15.5.0 and later. (CVE-2026-64644)

- A cache confusion of response bodies for requests with bodies. This issue only affects versions 13.0.0 and later. (CVE-2026-64648)

- A cache confusion of response bodies for requests with bodies containing invalid UTF-8 byte sequences. This issue only affects versions 13.0.0 and later. (CVE-2026-64647)

- An unauthenticated disclosure of internal Server Function endpoints. This issue only affects versions 13.0.0 and later. (CVE-2026-64643)

Note that the scanner has not attempted to exploit these issues but has instead relied only on application's self-reported version number.

There are packages installed that are affected by a vulnerability referenced in the following CVE:

  - 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. (CVE-2026-64642)

The Next.js Framework on the remote host is affected by an authentication bypass vulnerability:

  - 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. (CVE-2026-64642)

Note that Nessus has not tested for these issues but has instead relied only on the application's self-reported version number.

ID	Name	Product	Family	Type	Severity
115757	Next.js 16.0.x < 16.2.11 Multiple Vulnerabilities	Web App Scanning	Component Vulnerability	Version Based	high
115756	Next.js 12.0.0 < 15.5.21 Multiple Vulnerabilities	Web App Scanning	Component Vulnerability	Version Based	high
465002	Echo: next: security update to 16.2.11	Tenable Cloud Security	Echo Local Security Checks	Local	high
465002	Echo: next: security update to 16.2.11	Tenable Self-Hosted Container Security	Echo Local Security Checks	Local	high
330087	Next.js Framework 16.x < 16.2.11 Middleware Bypass	Nessus	Misc.	Local	high
445138	SCA: security update for next (GHSA-6gpp-xcg3-4w24)	Tenable Cloud Security	SCA Checks	Local	high
445138	SCA: security update for next (GHSA-6gpp-xcg3-4w24)	Tenable Self-Hosted Container Security	SCA Checks	Local	high

Detections

Analytics

CVE-2026-64642

high

Tenable Plugins

high

high

high

high

high

high

high