---
id: CVE-2026-44579
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 
  to before 15.5.16 and 16.2.5, applications using Partial Prerendering through
  the Cache Components feature can be vulnerable to connection exhaustion
  through cr…
severity: high
cvss: 7.5
cvssVector: 'CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H'
cwe:
  - CWE-770
  - CWE-833
vendor: vercel
product: next.js
affected:
  - 'next.js >= 15.0.0, < 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-2026-44579'
references:
  - url: 'https://github.com/vercel/next.js/security/advisories/GHSA-mg66-mrh9-m8jx'
    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-2026-44579'
    label: 0b0ca135-0b70-47e7-9f44-1890c2a1c46c
  - url: 'https://bugzilla.redhat.com/show_bug.cgi?id=2477193'
    label: 0b0ca135-0b70-47e7-9f44-1890c2a1c46c
  - url: >-
      https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-44579.json
    label: 0b0ca135-0b70-47e7-9f44-1890c2a1c46c
tags:
  - nvd
  - exploit-available
epss: 0.00746
epssPercentile: 0.53317
ingestedAt: '2026-07-03T14:03:37.061Z'
exploits:
  github: 1
  githubRepos:
    - 'https://github.com/iamfarzad/fbcounsulting_v2'
  checkedAt: '2026-09-23T07:14:05.824Z'
exploitAvailable: true
---

## Overview

Next.js is a React framework for building full-stack web applications. From  to before 15.5.16 and 16.2.5, applications using Partial Prerendering through the Cache Components feature can be vulnerable to connection exhaustion through crafted POST requests to a server action. In affected configurations, a malicious request can trigger a request-body handling deadlock that leaves connections open for an extended period, consuming file descriptors and server capacity until legitimate users are denied service. This vulnerability is fixed in 15.5.16 and 16.2.5.

## Affected

- `next.js >= 15.0.0, < 15.5.16`
- `next.js >= 16.0.0, < 16.2.5`

## Remediation

Upgrade past the affected range:

- `next.js 16.2.5`