# Next.js v16.3.4 — Release & Upgrade Intelligence
- **Product:** Next.js (https://nextjs.org)
- **Version:** v16.3.4
- **Released:** Aug 31, 2026
- **Impact Score:** 5/10
- **Breaking Changes:** Not verified
- **Canonical Analysis:** https://changelogs.us/nextjs/updates/v16.3.4/

## Executive Summary (TL;DR)
Next.js v16.3.4. Source highlight: Follow-up release to v16.3.3 re-enabling AVIF Image Optimization (#97949).

## Bug Fixes
- testmode: Fix infinite recursion in testmode passthrough fetch (#97691)
- Fix build error when aliasing typescript to @typescript/typescript6 (#97997)
- Fix unset crossOrigin in Turbopack manifests (#97930)

## Upgrade Command
```bash
npm install --save-exact next@16.3.4
```