Next.js / update detail

v15.5.18

Official Next.js changelog summary with source attribution, release tags, and community reactions.

Track this Next.js release note alongside related changelog updates, risky changes, and weekly digest signals from the developer community.

Next.js·2 months ago · May 7, 2026, 08:18 PMChangeSecurity-relevantAI-assisted summary

Summary

Patched high‑severity vulnerabilities including DoS via server components, middleware/proxy bypasses, SSRF in WebSocket upgrades, and cache poisoning in React Server Component responses.
Fixed moderate and low‑severity issues such as XSS in App Router CSP nonces and beforeInteractive scripts, DoS in Image Optimization API, and cache poisoning via route parameter injection.

securitysource healthy

Official source Last checked 8 hours ago

official source

Verify the original release note

Every summary should remain traceable to the original changelog or release source.

AI-assisted summarysource healthyLast checked 8 hours ago

related updates

Next.js·7 days agoFix

Summary

Published the @next/swc wasm web package that was unintentionally omitted since v15.5.15.