securing-data-access-layer
CommunityCentralize auth checks with DAL to prevent bypasses.
System Documentation
What problem does it solve?
This Skill teaches how to design a robust Data Access Layer (DAL) in Next.js 16 apps to prevent the common authentication bypass vulnerability described in CVE-2025-29927. By moving authentication checks into a centralized security boundary and enforcing verification before any data access, you reduce the risk of bypasses that middleware alone cannot guarantee.
Core Features & Use Cases
- Centralize authentication verification with a cached verifySession() function that runs per request.
- Enforce security boundaries by verifying authentication before any data access (DAL) and before server actions.
- Layered security architecture: Route Protection (UX), Data Access Layer (security), and Server Actions (mutation security).
- Server-only code that cannot leak to the client, preserving data integrity.
Quick Start
Add a server-only lib/dal.ts with verifySession(), and wire verifySession() into every data-fetching function and server action to ensure authenticated access.
Dependency Matrix
Required Modules
None requiredComponents
💻 Claude Code Installation
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Please help me install this Skill: Name: securing-data-access-layer Download link: https://github.com/djankies/claude-configs/archive/main.zip#securing-data-access-layer Please download this .zip file, extract it, and install it in the .claude/skills/ directory.
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