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CVE-2026-64644

MEDIUM
6.3
CVSS 4.0
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.

Metadata

CVE ID
CVE-2026-64644
State
PUBLISHED
Assigner
GitHub_M
Reserved
2026-07-20 17:11 UTC
Published
2026-07-27 17:54 UTC
Last updated
2026-07-27 18:35 UTC
Primary CWE
CWE-407
CWE-407: Inefficient Algorithmic Complexity
Vendor / Product
vercel / next.js
Sources
cve.org  ·  NVD

Severity & Metrics

6.3 MEDIUM CVSS 4.0
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
SSVC — CISA Coordinator
Exploitation
none
Automatable
no
Tech. Impact
partial
Affected products (1)
VendorProductPlatformVersions
vercel next.js — >= 15.5.0, < 15.5.21, >= 16.0.0, < 16.2.11
Weakness (CWE)
CWESourceDescription
CWE-407 cna CWE-407: Inefficient Algorithmic Complexity
CVSS scores (1)
ScoreSeverityVersionSourceVector
6.3 MEDIUM 4.0 cna 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
References (5)
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