Next.js 16.3.4

Vercel has shipped Next.js 16.3.4, the latest patch release of its React framework. The update re-enables AVIF image optimization and backports three bug fixes from the canary train. It was released on August 31, 2026.

What Changed

The headline change is the restoration of AVIF image optimization, which had been turned off in the prior release. Alongside it, the team fixed an infinite recursion bug in the test mode passthrough fetch, a build error that appeared when aliasing TypeScript to @typescript/typescript6, and an issue where crossOrigin was left unset in Turbopack manifests.

Why It Matters

AVIF support matters for teams relying on modern image formats to shrink payload sizes. The Turbopack fix reaches further, correcting how cross-origin resources are declared in the generated manifests.

What Next

Because 16.3.4 is a patch release, the upgrade is low risk. The release notes confirm it does not include the pending features still sitting on the canary branch.