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web security

Next.js Security Update: Patch the October 2026 Critical RCEs Today

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Next.js security update October 2026 — patching critical RCE vulnerabilities

On Wednesday, October 14, 2026, Vercel shipped the out-of-band Next.js security update it had flagged six days earlier. The release patches two critical unauthenticated remote code execution vulnerabilities and one high-severity denial-of-service bug in upstream dependencies. The fixed versions are Next.js 16.4.1 (Active LTS) and Next.js 15.5.28 (Maintenance LTS). Two of the three flaws need … Read more

How to Fix CORS Errors: The Complete Guide for Every Stack (2026)

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How to fix CORS error: browser and API server exchanging access-control headers

Last verified: October 14, 2026. Every claim and code snippet in this guide was checked against official documentation today. Your API works in Postman. Your API works with curl. But the moment your frontend calls it from a browser, you get the red wall of death: If you want to know how to fix CORS … Read more