DIAMOND How To Exploit "Open Banking" (Section 1033) API Gaps

[TheMekanic]

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With the 2026 "Open Banking" regulations, many banks have been forced to open APIs that have weaker bot protection than their main websites.
Steps to Exploit:

1. Endpoint Discovery: Find the
   
   Code:

   /third-party/v1/
   or
   
   Code:

   /open-banking/
   endpoints.
   
2. OAuth Grant Hijacking: Use an intercepted
   
   Code:

   client_id
   from a legitimate third-party app (like Mint or Yodlee).
   
3. MFA Bypass: These APIs often allow "Machine-to-Machine" (M2M) tokens that bypass standard SMS 2FA for account balance checks.
   
4. Data Capture: Use GraphQL queries to pull full transaction histories in a single hit.