OWASP Top 10 Security Risks Explained for 2026

/Why the OWASP Top 10 Matters

The Open Worldwide Application Security Project (OWASP) Top 10 represents the most critical security risks facing web applications. It is updated every few years based on real-world incident data. Regulators, insurers, and auditors routinely reference it as the minimum bar for secure development.

/A01: Broken Access Control

Broken access control remains the top risk. It occurs when users can act outside their intended permissions — accessing other users' accounts, viewing sensitive data, or modifying data without authorization. Common failures include insecure direct object references (IDOR) and missing function-level authorization checks.

• Enforce authorization server-side, never trust the client
• Use indirect references and validate object ownership per request
• Default to deny; require explicit allow rules

/A02: Cryptographic Failures

Formerly "Sensitive Data Exposure", this covers failures related to cryptography that lead to exposure of sensitive data. The fix is to classify data by sensitivity and apply encryption in transit (TLS 1.3) and at rest (AES-256), never use deprecated algorithms, and disable caching for sensitive responses.

/A03: Injection

Injection flaws — SQL, NoSQL, OS command, LDAP — occur when untrusted data is sent to an interpreter as part of a command or query. SQL injection remains widespread despite being well understood.

Vulnerable:  SELECT * FROM users WHERE email = '<userInput>'

Safe (parameterized):
  cursor.execute("SELECT * FROM users WHERE email = %s", (userInput,))

/A04: Insecure Design

Insecure design is a broad category capturing missing or ineffective control design. It cannot be fixed by implementation alone; it requires threat modeling and secure design patterns from the architecture phase (privacy by design, aligned with GDPR Article 25).

/A05: Security Misconfiguration

Default accounts, verbose error messages, unnecessary features enabled, missing security headers, and unpatched flaws all fall here. Most breaches attributed to "hacking" trace back to a misconfiguration rather than a novel exploit.

/A06–A10: The Remaining Risks

• A06 Vulnerable & Outdated Components: keep dependencies patched, track SBOMs
• A07 Identification & Authentication Failures: MFA, secure session handling, credential rotation
• A08 Software & Data Integrity Failures: verify CI/CD pipelines, sign dependencies
• A09 Security Logging & Monitoring Failures: log security events, alert on anomalies
• A10 Server-Side Request Forgery (SSRF): validate and restrict outbound requests

“You cannot remediate what you have not found. Continuous automated scanning paired with periodic manual testing is the only reliable way to stay ahead of the Top 10.”

Our platform evaluates every application against the full OWASP Top 10 with both automated checks and expert manual verification. Run a free initial assessment to see where you stand.