Authentication and Authorization Flaws in Next.js

Common vulnerabilities include insecure session management, weak token validation, missing authorization checks on API routes, and client-side only authentication without server-side validation.

Sources

• https://www.turbostarter.dev/blog/complete-nextjs-security-guide-2025-authentication-api-protection-and-best-practices
• https://www.holgerscode.com/blog/2026/01/30/stop-the-hype-lets-look-at-the-facts-before-leaving-nextjs-in-2026/

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