CVE-2026-44577 — Next.js: Denial of Service in the Image Optimization API

Description (CNA)

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 (CNA)

Vendor / product	Versions
vercel / next.js	affected >= 10.0.0, < 15.5.16; affected >= 16.0.0, < 16.2.5

CWE

CWE-770

References

https://github.com/vercel/next.js/security/advisories/GHSA-h64f-5h5j-jqjh

ADP enrichment

CISA-ADP

No English description supplied.

No references supplied.

redhat-SADP

A flaw was found in Next.js. 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. A remote attacker could exploit this by requesting large local assets from the /_next/image endpoint. This can lead to out-of-memory conditions, resulting in a Denial of Service (DoS) for the application.