---
id: CVE-2026-44574
title: Next.js is a React framework for building full-stack web applications
summary: >-
  Next.js is a React framework for building full-stack web applications. From
  15.4.0 to before 15.5.16 and 16.2.5, applications that rely on middleware to
  protect dynamic routes can be vulnerable to authorization bypass. In affected
  deploy…
severity: high
cvss: 8.1
cvssVector: 'CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:N'
cwe:
  - CWE-288
  - CWE-551
vendor: vercel
product: next.js
affected:
  - 'next.js >= 15.4.0, < 15.5.16'
  - 'next.js >= 16.0.0, < 16.2.5'
patched:
  - next.js 16.2.5
published: '2026-05-13'
updated: '2026-07-03'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2026-44574'
references:
  - url: 'https://github.com/vercel/next.js/security/advisories/GHSA-492v-c6pp-mqqv'
    label: security-advisories@github.com
  - url: 'https://access.redhat.com/errata/RHSA-2026:34608'
    label: 0b0ca135-0b70-47e7-9f44-1890c2a1c46c
  - url: 'https://access.redhat.com/security/cve/CVE-2026-44574'
    label: 0b0ca135-0b70-47e7-9f44-1890c2a1c46c
  - url: 'https://bugzilla.redhat.com/show_bug.cgi?id=2477207'
    label: 0b0ca135-0b70-47e7-9f44-1890c2a1c46c
  - url: >-
      https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-44574.json
    label: 0b0ca135-0b70-47e7-9f44-1890c2a1c46c
tags:
  - nvd
epss: 0.00636
epssPercentile: 0.49135
ingestedAt: '2026-07-03T14:03:37.046Z'
---

## Overview

Next.js is a React framework for building full-stack web applications. From 15.4.0 to before 15.5.16 and 16.2.5, applications that rely on middleware to protect dynamic routes can be vulnerable to authorization bypass. In affected deployments, specially crafted query parameters can alter the dynamic route value seen by the page while leaving the visible path unchanged, which can allow protected content to be rendered without passing the expected middleware check. This vulnerability is fixed in 15.5.16 and 16.2.5.

## Affected

- `next.js >= 15.4.0, < 15.5.16`
- `next.js >= 16.0.0, < 16.2.5`

## Remediation

Upgrade past the affected range:

- `next.js 16.2.5`