ConceptsInput Validation

Input Validation

Checking external input against expected rules before the application trusts or stores it.

Glossary definition

12 direct links2 lessons

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SQL Injection

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Builds towardInput Validation is a foundation for these

Function Code Security

Securing the code inside a serverless function, validating inputs, avoiding injection and insecure dependencies, and handling secrets safely, since the function's own logic is part of the attack surface even though the platform manages the servers.

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Curated pairinghand-picked as a natural companion

SQL InjectionStart here

A vulnerability where untrusted input changes the meaning of a database query.

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Relatedsorted by lesson coverage

Web Client

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Query String

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Allowlist Validation

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Command Injection

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Event Source Security

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Injection

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Show 4 more connections

Parameterized Queries

lesson

Sanitization

lesson

Server-Side Authorization

lesson

XSS

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Related Lessons

2 lessons cover this concept

Input Handling and Injection Attacks

General Beginner

Application and Service Hardening

General Beginner