#server-actions articles

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Next.js SSRF defense checklist: securing Route Handlers and Server Actions (2026)

nextjssecurityssrf

October 6, 2026·11 min read

Next.js SSRF defense checklist: securing Route Handlers and Server Actions (2026)

A practical security checklist for preventing Server-Side Request Forgery (SSRF) in Next.js: restrict protocols, validate resolved IP addresses against private networks, handle DNS rebinding, and inspect redirects.

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Fix "Failed to find Server Action" in Next.js after a deploy (2026)

nextjsserver-actionsdeployment

October 6, 2026·7 min read

Fix "Failed to find Server Action" in Next.js after a deploy (2026)

Why Next.js throws "Failed to find Server Action ... older or newer deployment": stale browser tabs, rolling deploys, and mismatched encryption keys. Includes a diagnostic table, deploymentId and NEXT_SERVER_ACTIONS_ENCRYPTION_KEY config, and a verification routine.

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Next.js Server Actions security checklist: auth, validation, and CSRF (2026)

nextjssecurityauthorization

September 20, 2026·11 min read

Next.js Server Actions security checklist: auth, validation, and CSRF (2026)

A practical checklist for securing Next.js Server Actions: treat each action as a public POST endpoint, re-check auth and ownership, validate input, limit return values, and configure allowedOrigins correctly.