What Netlify does
Netlify's September 30, 2026 advisory covers seven Next.js vulnerabilities with different affected configurations. Some do not affect Netlify deployments; impact depends on router, build mode and caching features, not simply the hosting provider's name.
The advisory recommends Next.js 15.5.27 or 16.3.8 and @netlify/plugin-nextjs 5.16.1, followed by redeployment. The default auto-installed adapter updates on redeploy; a pinned adapter needs a manual update. Public previews and branch deployments can retain older code. These versions address this dated advisory, not every future vulnerability.