CVE-2026-64644Medium▾ SunlitNext.js: Denial of Service in the Image Optimization API using SVGs
▾ Sunlit zone — Low / medium · no exploitation signal
impact 27.5 · likelihood 0.1 · exploitation 0
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Exploit-prediction probability, daily snapshots since Jul 28.
Disclosure to exploitation, from the record and what we observed since indexing it.
Disclosed via GHSA
0.5%
0.5% → 0.7%
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.
config.images.remotePatterns, only the patterns in that array are impacted.config.images.unoptimized: true, you are NOT impacted.config.images.loader: 'custom', you are NOT impacted.If you cannot upgrade immediately, you can avoid the expensive work by setting config.experimental.imgOptSkipMetadata : true.
next >= 15.5.0, < 15.5.21next >= 16.0.0, < 16.2.11Upgrade to a patched release:
next 15.5.21next 16.2.11Connected by shared product, vendor, weakness, or advisory.
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