Api Key Exposure in Fiber with Oracle Db

When a Fiber application connects to an Oracle database, developers sometimes embed database credentials or service keys directly in route handlers or middleware. This pattern creates an Api Key Exposure risk because the keys become part of the request surface that middleBrick scans. During a black-box scan, middleBrick tests unauthenticated endpoints and checks for sensitive data in responses, logs, and error messages. If a route constructs dynamic SQL using string concatenation, a leaked API key embedded in the route can be inferred from error messages or misconfigured logging.

Consider a typical insecure Fiber route that includes an Oracle connection string with embedded credentials:

const { Router } = require('express'); // Fiber uses similar patterns
const oracledb = require('oracledb');

router.get('/data', async (req, res) => {
  const connection = await oracledb.getConnection({
    user: 'admin',
    password: 'SuperSecret123', // hardcoded API key exposure
    connectString: 'localhost/orclpdb1'
  });
  const result = await connection.execute('SELECT * FROM users');
  res.json(result.rows);
});

In this example, the password acts as an API key for the Oracle database. If an attacker triggers an error (for instance, by sending malformed input), the stack trace may reveal the password. middleBrick’s Data Exposure and Input Validation checks flag this pattern, assigning a high severity finding because the key is both hardcoded and exposed through runtime errors. The scan also cross-references the OpenAPI spec, if available, and detects that the route lacks authentication, compounding the risk.

Additionally, if the application logs query parameters or connection details, the hardcoded password can appear in logs, which middleBrick’s Data Exposure check identifies. The combination of an unauthenticated endpoint, weak error handling, and hardcoded credentials means the API key is exposed through both the application’s responses and its operational artifacts. This aligns with common weaknesses enumerated in the OWASP API Top 10, particularly regarding sensitive data exposure.

middleBrick’s LLM/AI Security checks do not apply here because this scenario involves database credentials rather than model endpoints, but the scanner’s Inventory Management and Authentication checks ensure that the endpoint is not inadvertently left open. By running a scan with just the URL, developers can see exactly where keys are exposed without needing to deploy agents or provide credentials.

To remediate Api Key Exposure when using Oracle Db with Fiber, avoid embedding credentials in route code. Instead, use environment variables and secure configuration management. Below is a secure pattern that retrieves credentials from environment variables and uses Oracle connection pools safely:

const { Router } = require('express');
const oracledb = require('oracledb');

// Ensure these are set in the environment, never in code
const dbUser = process.env.ORACLE_USER;
const dbPassword = process.env.ORACLE_PASSWORD;
const dbConnectString = process.env.ORACLE_CONNECT_STRING;

const router = Router();

router.get('/data', async (req, res) => {
  let connection;
  try {
    connection = await oracledb.getConnection({
      user: dbUser,
      password: dbPassword,
      connectString: dbConnectString
    });
    const result = await connection.execute('SELECT * FROM users');
    res.json(result.rows);
  } catch (err) {
    // Avoid exposing sensitive details in errors
    console.error('Database query failed');
    res.status(500).json({ error: 'Internal server error' });
  } finally {
    if (connection) {
      try {
        await connection.close();
      } catch (closeErr) {
        console.error('Error closing connection');
      }
    }
  }
});

module.exports = router;

This approach ensures that API keys (database passwords) are not present in source code or logs. middleBrick’s scans will then show improved scores in the Authentication and Data Exposure categories because credentials are no longer hardcoded. For CI/CD safety, add the GitHub Action to fail builds if environment variables are missing or if scans detect hardcoded patterns.

Additionally, use Oracle wallet or client-side encryption for highly sensitive configurations, and enforce strict network policies so that the database is only accessible from trusted services. With these fixes, the same middleBrick scan will reflect a lower risk score and provide traceable remediation guidance aligned with compliance frameworks like PCI-DSS and SOC2.