# Next.js v16.4.2 — Release & Upgrade Intelligence
- **Product:** Next.js (https://nextjs.org)
- **Version:** v16.4.2
- **Released:** Oct 15, 2026
- **Impact Score:** 5/10
- **Breaking Changes:** Not verified
- **Canonical Analysis:** https://changelogs.us/nextjs/updates/v16.4.2/

## Executive Summary (TL;DR)
Next.js v16.4.2. Source highlight: [lts-active] turbo-tasks snapshot consistency fixes (#99644, #99732, #99649)

## Bug Fixes
- [lts-active] turbo-tasks snapshot consistency fixes (#99644, #99732, #99649)
- [lts-active] fix(next-code-frame): snap visible window to char boundaries
- [lts-active] [turbopack] Fix two GC paths that leave half-torn-down dependency edges
- [lts-active] Backport docs fixes since v16.4.0
- [lts-active] Fix Turbopack lazy dynamic-import chunk-list collisions
- [lts-active] Backport additional documentation fixes since v16.4.0

## Upgrade Command
```bash
npm install --save-exact next@16.4.2
```