Identification Failures in Express with Cockroachdb

An Identification Failure occurs when an API does not properly enforce identity, permissions, or scope checks on resources. In Express applications that use CockroachDB as the backend data store, this typically manifests as Insecure Direct Object References (IDOR) or Broken Object Level Authorization (BOLA). Because CockroachDB supports distributed SQL with rich SQL semantics, developers often write complex joins and row-level queries directly in JavaScript or TypeScript route handlers. If those queries interpolate user input such as :id or :userId without strict ownership or tenant scoping, an attacker can modify identifiers to access another user’s data.

For example, consider an Express route that fetches a user’s profile using a numeric ID from the URL and a CockroachDB query built with string concatenation or naive template literals. An authenticated user who changes the ID in the request can enumerate or manipulate other profiles because the query never validates that the profile belongs to the requesting user. This is an Identification Failure: the server trusts the identifier alone rather than proving that the authenticated subject has the right to that specific record.

With CockroachDB, distributed transactions and secondary indexes can make it easier to accidentally expose related resources if authorization checks are applied inconsistently across tables. For instance, if tenant_id or user_id columns exist but are not enforced in every query, an attacker leveraging IDOR can pivot across tenants or roles. Another vector arises when Express routes map 1:1 to CockroachDB rows by primary key without verifying group memberships or roles. Because CockroachDB returns results quickly, an attacker can perform rapid enumeration to discover valid identifiers and infer data patterns, leading to sensitive data exposure or privilege escalation.

These risks are compounded when using an OpenAPI spec that defines path parameters like {id} without constraining them to the requesting user’s scope. middleBrick scans detect these Identification Failures by correlating runtime behavior with the spec, flagging endpoints where object-level authorization is missing or ambiguous. The scanner tests whether modifying identifiers yields different data responses, indicating that authorization is not properly bound to the authenticated identity.

To remediate Identification Failures when using CockroachDB in Express, always bind the authenticated subject into the query so that the database enforces ownership. Avoid building SQL by string interpolation; use parameterized queries with placeholders to prevent injection and ensure consistent filtering by tenant or user.

Below is a secure Express route example that retrieves a user profile only if the requested ID matches the authenticated user’s ID, using CockroachDB with the node-postgres driver.

const express = require('express');
const { Pool } = require('pg');

const pool = new Pool({
  connectionString: process.env.DATABASE_URL,
});

const app = express();

// Secure route: user can only fetch their own profile
app.get('/api/profile/:id', async (req, res) => {
  const userId = req.user.sub; // authenticated subject from session or JWT
  const requestedId = req.params.id;

  if (userId !== requestedId) {
    return res.status(403).json({ error: 'Forbidden: cannot access other profile' });
  }

  const query = {
    text: 'SELECT id, email, display_name FROM users WHERE id = $1 AND tenant_id = $2',
    values: [requestedId, req.user.tenantId],
  };

  try {
    const { rows } = await pool.query(query);
    if (rows.length === 0) {
      return res.status(404).json({ error: 'Not found' });
    }
    res.json(rows[0]);
  } catch (err) {
    console.error(err);
    res.status(500).json({ error: 'Internal server error' });
  }
});

app.listen(3000, () => console.log('API running on port 3000'));

Key points in this fix: the authenticated user’s ID is compared before the database query, and the CockroachDB query includes tenant_id as an additional filter. Even if an attacker changes :id, the server denies access unless it matches the authenticated subject. Using parameterized values ($1, $2) ensures safe execution plans and avoids SQL injection.

For broader remediation across your API surface, the middleBrick CLI can scan endpoints from the terminal with middlebrick scan <url>, producing a per-category breakdown that highlights Identification Failures and maps findings to frameworks like OWASP API Top 10. If you integrate middleBrick into your pipeline, the Pro plan adds CI/CD gates via the GitHub Action, failing builds when risk scores exceed your chosen threshold.