- Performance and rendering tweaks: cache layer roots, short‑circuit isIgnored checks, break recursive rendering deadlocks, defer head DOM updates, and inline CSS optimizations for server components.
- Bug fixes across Nitro, Vite and Nuxt: correct payload route rule, preserve serverHandlers after nitro:config, handle string presets in auto‑imports, fix island transform for server pages, and correct various build and type issues.
- Docs and housekeeping: added routing warning for server components, ignored pnpm cyclic workspace warnings, removed jiti from build steps, and updated tests and snapshots.
v3.21.5
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Fix island payload serialization for underscore keys and deduplicate island renders during prerender
Improved build and runtime performance with lazy imports, reused scans, and skipping unchanged files across Nuxt, Kit, and Vite.
Security release addressing server‑side RCE, unauthorized component instantiation, route rule authorization bypass, DoS, and dev server path disclosure, plus a regression fix from the prior advisory.