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What Is SQL Injection?

SQL injection security database security injection attacks
SQL Injection : A code injection technique that exploits vulnerabilities in an application’s database layer by inserting malicious SQL statements into input fields. When user input is concatenated directly into SQL queries instead of using parameterized statements, attackers can read, modify, or delete database contents.

Why It Matters for AI-Coded Apps

AI coding tools frequently generate string-concatenated SQL queries, especially in quick prototypes. Our scans found that 34% of vibe-coded apps with database access used at least one vulnerable query pattern. LLMs often prioritize readability over security when constructing database queries.

Real-World Example

A login form with the query SELECT * FROM users WHERE username = '" + username + "' AND password = '" + password + "'. An attacker enters ' OR '1'='1' -- as the username, which transforms the query into SELECT * FROM users WHERE username = '' OR '1'='1' --' AND password = '', bypassing authentication entirely.

How to Detect and Prevent It

Always use parameterized queries or prepared statements. Use an ORM (Prisma, SQLAlchemy, ActiveRecord) which handles parameterization automatically. Never concatenate user input into SQL strings. Apply least-privilege database permissions so even a successful injection limits damage.

Frequently Asked Questions

Can ORMs prevent SQL injection completely?

ORMs prevent SQL injection for standard queries by using parameterized statements internally. However, raw query methods (like Prisma’s $queryRaw or SQLAlchemy’s text()) can still be vulnerable if you concatenate user input. Always parameterize even raw queries.

Is SQL injection still relevant in 2026?

Yes. SQL injection remains in the OWASP Top 10 and is one of the most common vulnerabilities in AI-generated code. LLMs frequently generate vulnerable query patterns, especially for dynamic filtering and search features.

What is blind SQL injection?

Blind SQL injection occurs when the application doesn’t display database errors but is still vulnerable. Attackers infer information by asking true/false questions through the query and observing response differences (time-based or boolean-based). It’s slower but equally dangerous.

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