CVE-2026-44577
Medium
Description
Next.js is a React framework for building full-stack web applications. From 10.0.0 to before 15.5.16 and 16.2.5, when self-hosting Next.js with the default image loader, the Image Optimization API fetches local images entirely into memory without enforcing a maximum size limit. An attacker could cause out-of-memory conditions by requesting large local assets from the /_next/image endpoint that match the images.localPatterns configuration (by default, all patterns are allowed). This vulnerability is fixed in 15.5.16 and 16.2.5.
SeverityMedium
CVSS5.9
Exploit probability—
Product
Vercel Next.js
PublishedMay 13, 2026
First seenMay 13, 2026
Weakness typeCWE-770Allocation of resources without limits
How to fix
Update
- vercel next.js15.5.16, 16.2.5 or later
- next15.5.16, 16.2.5 or later
Affected products
| Product | Affected versions | Fixed in |
|---|---|---|
| vercel next.js | 10.0.0 ≤ v < 15.5.16, 16.0.0 ≤ v < 16.2.5 | 15.5.16, 16.2.5 |
| nextnpm | 10.0.0 ≤ v < 15.5.16, 16.0.0 ≤ v < 16.2.5 | 15.5.16, 16.2.5 |
Check your version
Choose the product and enter the version you run to see whether it falls in the affected range.
In the Intelligence 360 plan
Attack Surface Management
See the assets tied to your domains, the technologies they run and known vulnerabilities in one list.