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What is SQL Injection?

An attack where malicious SQL code is inserted into application queries through user input to access or manipulate the database.

SQL injection occurs when user input is directly concatenated into SQL queries without sanitization. An attacker might enter ' OR 1=1 -- as a username, bypassing authentication or extracting data.

Prevention methods include parameterized queries (prepared statements), input validation, least-privilege database accounts, and ORM usage. SQL injection remains one of the OWASP Top 10 vulnerabilities and can lead to complete database compromise.

Related Terms

Two-Factor Authentication (2FA)
A security method requiring two different forms of identification before granting access to an account.
Secret Management
The practice of securely storing, accessing, and rotating sensitive credentials like API keys, passwords, and certificates.
DAST (Dynamic Application Security Testing)
Testing a running application from the outside by sending malicious requests to discover security vulnerabilities.
Vulnerability Scanning
Automated testing that identifies known security weaknesses in systems, applications, and network infrastructure.
Webhook Signature Verification
A security mechanism that verifies webhook payloads are authentic and unmodified using cryptographic signatures.
SAST (Static Application Security Testing)
Automated analysis of source code to find security vulnerabilities without executing the application.
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