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CVE-2026-64644GHSA-Q8WF-6R8G-63CH

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

Published
Last modified
published
Not listed in CISA KEV
Fix
Fixed in 15.5.21, 16.2.11
None on Exploit-DB, Metasploit or GitHub
  • Exploitation: none
  • Automatable: no
  • Technical impact: partial

Summary

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.

Timeline

  1. CVE published
  2. CISA SSVC assessment

    Exploitation: none · Automatable: no · Technical impact: partial

  3. Record last updated

Affected versions

  • vercel next.js

    From 15.5.0 · fixed in 15.5.21; From 16.0.0 · fixed in 16.2.11

  • nextnpm

    From 15.5.0 · fixed in 15.5.21

  • nextnpm

    From 16.0.0 · fixed in 16.2.11

References 5

GitHub · vercel/next.js