CWE-359 Privacy Violation

Description

Privacy Violation

Reference: https://cwe.mitre.org/data/definitions/359.html

OWASP Category: A02:2021 – Cryptographic Failures

---

Vulnerable Pattern

❌ Example 1: Vulnerable Pattern

// VULNERABLE: PII exposed in logs
log.info("User login: " + user.getEmail() + ", SSN: " + user.getSsn());

// VULNERABLE: PII in API response
return new UserResponse(user.getName(), user.getSsn(), user.getAddress());

Why it's vulnerable: This pattern is vulnerable to Privacy Violation

---

Deterministic Fix

✅ Secure Implementation: Secure Implementation

// SECURE: Mask PII in logs
log.info("User login: {}", maskEmail(user.getEmail()));

// SECURE: Only expose necessary data, mask sensitive fields
public UserResponse toResponse(User user) {
    return UserResponse.builder()
        .name(user.getName())
        .email(maskEmail(user.getEmail()))
        .ssnLast4(user.getSsn().substring(user.getSsn().length() - 4))
        .build();
}

private String maskEmail(String email) {
    int at = email.indexOf('@');
    return email.charAt(0) + "***" + email.substring(at);
}

Why it's secure: Implements proper protection against Privacy Violation

---

Detection Pattern

Look for these patterns in your codebase:

# Find PII in logs
grep -rn "log.*ssn\\|log.*email\\|log.*password" --include="*.java"

---

Remediation Steps

1. Identify all PII fields (SSN, email, address, etc.)

2. Mask PII in logs

3. Return minimal data in API responses

4. Implement data minimization principles

---

Key Imports

---

Verification

After remediation:

• Run SAST scanner to confirm vulnerability is resolved

• Review all instances of the vulnerable pattern

• Add unit tests that verify the secure implementation

• Check for similar patterns in related code

---

Trigger Examples

Fix CWE-359 vulnerability
Resolve Privacy Violation issue
Secure this Java code against privacy violation
SAST reports CWE-359

---

Common Vulnerable Locations

Layer	Files	Patterns

| Controller | *Controller.java | User input handling |

| Service | *Service.java | Business logic |

| Repository | *Repository.java | Data access |

---

References

• CWE-359: Privacy Violation

---

Source: Generated by Java CWE Security Skills Generator Last Updated: 2026-03-07