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

### Impact 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. - If you are using `config.images.remotePatterns`, only the patterns in that array are impacted. - If you are using `config.images.unoptimized: true`, you are NOT impacted. - If you are using `config.images.loader: 'custom'`, you are NOT impacted. - If you are using Vercel, you are NOT impacted. ### Workarounds If you cannot upgrade immediately, you can avoid the expensive work by setting `config.experimental.imgOptSkipMetadata : true`.

Source published

22 Jul 2026 23:02:05 UTC

Source modified

10 Sep 2026 03:50:52 UTC

Observed here

24 Oct 2026 13:17:17 UTC

Source terms

GitHub Advisory Database · CC-BY-4.0

Original source record · Cite this exact observation · Complete original publisher JSON

This view projects the publisher's source fields for reading; the original JSON retains additional fields and CVE enrichment containers. Attribution: osv · GitHub Advisory Database · CC-BY-4.0. Source text is retained; field grouping and change labels are provided by ChangeIntel.

CVSS_V4 · 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

Publisher rating · MODERATE