CVE-2024-51479 Authorization bypass in Next.js
Attackers can bypass middleware-based authorization checks for root-level pages in Next.js applications, potentially accessing protected resources.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- Available
What is CVE-2024-51479?
CVE-2024-51479 is a high-severity authentication bypass vulnerability in Vercel Next.js, published on 17 Dec 2024. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official description
Next.js is a React framework for building full-stack web applications. In affected versions if a Next.js application is performing authorization in middleware based on pathname, it was possible for this authorization to be bypassed for pages directly under the application's root directory. For example: * [Not affected] `https://example.com/` * [Affected] `https://example.com/foo` * [Not affected] `https://example.com/foo/bar`. This issue is patched in Next.js `14.2.15` and later. If your Next.js application is hosted on Vercel, this vulnerability has been automatically mitigated, regardless of Next.js version. There are no official workarounds for this vulnerability.
Which versions are affected by CVE-2024-51479?
2 open source packages ship an affected version, including next. It affects 1 product.
| Package | Affected | Fixed in |
|---|---|---|
next npm | From 9.5.5 | 14.2.15 |
next npm | From 9.5.5 | 14.2.15 |
Products include Vercel Next.js.
How do I fix CVE-2024-51479?
Upgrade next to 14.2.15 or later.
Upgrade, and rotate credentials and sessions that may have been exposed. More about Authentication bypass.
Is CVE-2024-51479 being exploited?
There is no known exploitation of CVE-2024-51479 in the wild and no public exploit code.
Other vulnerabilities in Vercel Next.js
- CVE-2025-29927 Authorization Bypass in Next.js Middleware
- CVE-2026-44578 Next.js: Server-side request forgery in applications using WebSocket upgrades
- CVE-2026-94483 Next.js: Server-Side Request Forgery in Image Optimization
- CVE-2026-64642 Next.js: Middleware / Proxy bypass in App Router applications using Turbopack and single locale
- CVE-2026-64645 Next.js: Server-Side Request Forgery in rewrites via attacker-controlled destination hostname
Sources
Also known as GHSA-7gfc-8cq8-jh5f, MINI-9vw2-5xjf-3g9f, ROOT-APP-NPM-CVE-2024-51479.