Next.js 15 End of Life Is 15 Days Away — Here’s What You Need to Do
If your project is still running on Next.js 15, the clock is ticking. Next.js 15 officially reaches End of Life (EOL) on October 21, 2026 — just 15 days from today. After that date, it will no longer receive any security patches, critical bug fixes, or official support from Vercel.
What Does End of Life Mean for Next.js 15?
Next.js 15 entered Maintenance LTS on October 21, 2025 — exactly one year after its initial release. During the Maintenance LTS phase, it received only critical security patches and essential bug fixes. Once EOL hits on October 21, 2026, all support ends entirely. Any vulnerabilities discovered after that date will go unpatched on Next.js 15.
This is especially urgent given that the September 30, 2026 security release already patched 7 vulnerabilities (including one High severity) across both Next.js 16.3.8 and 15.5.27. After EOL, only Next.js 16 users will receive these kinds of critical fixes.
Current Next.js Support Status
- Next.js 16.x (Active LTS) — Released October 21, 2025. Fully supported with regular updates and security patches.
- Next.js 15.x (Maintenance LTS) — EOL: October 21, 2026. Critical patches only until then — then nothing.
- Next.js 14.x and below — Already EOL. No support whatsoever.
Why You Should Upgrade to Next.js 16 Now
Beyond the security implications, Next.js 16 brings significant improvements that make the upgrade worthwhile:
- Turbopack stable — Dramatically faster local development builds
- Improved App Router performance — Faster server component rendering
- Enhanced caching model — More predictable and controllable caching behavior
- Better TypeScript support — Improved type inference across the framework
- Continued security coverage — The September 2026 security release (16.3.8) is the latest example
How to Upgrade from Next.js 15 to 16
The upgrade path from Next.js 15 to 16 is relatively straightforward for most projects:
npm install next@latest react@latest react-dom@latestAfter updating, run your build and test suite to catch any breaking changes. Vercel’s official migration guide covers the full list of changes between versions.
Key Takeaway
With 15 days until Next.js 15 EOL, now is the time to plan and execute your upgrade to Next.js 16. Running an unsupported framework version exposes your application to unpatched security vulnerabilities and leaves you without a safety net. Don’t wait until October 21 — start your upgrade today.
Hashtags: #NextJS #WebDevelopment #JavaScript #Security #NextJS15 #NextJS16 #Vercel #FrontendDevelopment
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