---
id: CVE-2026-45109
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
  15.2.0 to before 15.5.18 and 16.2.6, it was found that the fix addressing
  CVE-2026-44575 did not apply to middleware.ts with Turbopack. This
  vulnerability is fix…
severity: high
cvss: 7.5
cvssVector: 'CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N'
cwe:
  - CWE-288
  - CWE-358
vendor: vercel
product: next.js
affected:
  - 'next.js >= 15.2.0, < 15.5.18'
  - 'next.js >= 16.0.0, < 16.2.6'
patched:
  - next.js 16.2.6
published: '2026-05-13'
updated: '2026-07-03'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2026-45109'
references:
  - url: 'https://github.com/vercel/next.js/security/advisories/GHSA-26hh-7cqf-hhc6'
    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-2026-45109'
    label: 0b0ca135-0b70-47e7-9f44-1890c2a1c46c
  - url: 'https://bugzilla.redhat.com/show_bug.cgi?id=2477190'
    label: 0b0ca135-0b70-47e7-9f44-1890c2a1c46c
  - url: >-
      https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-45109.json
    label: 0b0ca135-0b70-47e7-9f44-1890c2a1c46c
tags:
  - nvd
epss: 0.00761
epssPercentile: 0.53356
ingestedAt: '2026-07-03T14:03:37.064Z'
---

## Overview

Next.js is a React framework for building full-stack web applications. From 15.2.0 to before 15.5.18 and 16.2.6, it was found that the fix addressing CVE-2026-44575 did not apply to middleware.ts with Turbopack. This vulnerability is fixed in 15.5.18 and 16.2.6.

## Affected

- `next.js >= 15.2.0, < 15.5.18`
- `next.js >= 16.0.0, < 16.2.6`

## Remediation

Upgrade past the affected range:

- `next.js 16.2.6`