CVE-2026-64644

MEDIUM

Next.js: Denial of Service in the Image Optimization API using SVGs

Title source: cna
STIX 2.1

Description

Next.js is a React framework for building full-stack web applications. In versions 15.5.0 through 15.5.20 and 16.0.0 through 16.2.10, when self-hosting Next.js with the default image loader, the Image Optimization API can optimize remotely hosted images if configured (not enabled by default). If those images contain malicious content, they can cause CPU exhaustion in /_next/image endpoints.Only config.images.remotePatterns is affected, and just the patterns in that array, whereas config.images.unoptimized: true, config.images.loader: 'custom', and Vercel are not impacted. This issue has been fixed in versions 15.5.21 and 16.2.11.

References (5)

Core 5

Scores

CVSS v3 5.3
EPSS 0.0052
EPSS Percentile 41.4%
Attack Vector NETWORK
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L

CISA SSVC

Vulnrichment
Exploitation none
Automatable no
Technical Impact partial

Details

CWE
CWE-407
Status published
Products (3)
vercel/next.js 15.5.0 - 15.5.21
vercel/next.js >= 15.5.0, < 15.5.21
vercel/next.js >= 16.0.0, < 16.2.11
Published Jul 27, 2026
Tracked Since Jul 28, 2026