CVE-2025-59471 Next.js self-hosted applications vulnerable to DoS via Image Optimizer remotePatterns configuration
Attackers can cause out-of-memory denial of service in Next.js apps by requesting optimization of large external images when remotePatterns are configured.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- Available
What is CVE-2025-59471?
CVE-2025-59471 is a medium-severity denial of service vulnerability in Vercel Next.js, published on 26 Jan 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official description
A denial of service vulnerability exists in self-hosted Next.js applications that have `remotePatterns` configured for the Image Optimizer. The image optimization endpoint (`/_next/image`) loads external images entirely into memory without enforcing a maximum size limit, allowing an attacker to cause out-of-memory conditions by requesting optimization of arbitrarily large images. This vulnerability requires that `remotePatterns` is configured to allow image optimization from external domains and that the attacker can serve or control a large image on an allowed domain. Strongly consider upgrading to 15.5.10 or 16.1.5 to reduce risk and prevent availability issues in Next applications.
Weakness: CWE-400
Which versions are affected by CVE-2025-59471?
4 open source packages ship an affected version, including next. It affects 1 product.
| Package | Affected | Fixed in |
|---|---|---|
next npm | From 10.0.0 | 15.5.10 |
next npm | From 10.0.0 | 15.5.10 |
next npm | From 15.6.0-canary.0 | 16.1.5 |
next npm | From 15.6.0-canary.0 | 16.1.5 |
Products include Vercel Next.js.
How do I fix CVE-2025-59471?
Upgrade next to a fixed version for your release line: 15.5.10 or 16.1.5.
Upgrade, then put limits on request size, rate and nesting depth so one client cannot exhaust the service. More about Denial of service.
Is CVE-2025-59471 being exploited?
There is no known exploitation of CVE-2025-59471 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 CLEANSTART-2026-TD56649, CLSA-2026-1792195749, CLSA-2026-1792196878, CLSA-2026-1792206305, CLSA-2026-1792272231, CLSA-2026-1792293017 and 8 more.