CVE-2026-44577: Vercel Next.js

Medium severity, CVSS 5.9. EPSS: 0.9% chance of exploitation in the next 30 days.

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.

Affected products

• Vercel Next.js: from 10.0.0, before 15.5.16 (fixed in 15.5.16); from 16.0.0, before 16.2.5 (fixed in 16.2.5)

Published 2026-05-13. Last modified 2026-08-13.