If you hold an active account with Bancolombia, take immediate, proactive steps to protect your personal capital. 1. Update Core Application Credentials
The phrase where an unauthorized threat actor claimed to breach Colombia's largest commercial bank and leak sensitive database information . In April 2026, researchers discovered a significant repository of data shared on underground forums. The data allegedly originated from internal systems belonging to Grupo Bancolombia and Banco de Bogotá.
If you have concerns about your account or believe you've been affected by a breach: