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Vulnerabilities CVE-2026-64644

CVE-2026-64644

Medium
Open
TLP:CLEAR

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

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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.

Details

CVSS Score
6.3
EPSS Score
0.68%

49.2th percentile

CVSS Vector
CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N
Confidence
90%
Published
Jul 27, 2026
Last Modified
Jul 27, 2026
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