Columbia Bank Reports Data Breach to California Attorney General

Columbia Bank has filed an official data breach notification with the California Attorney General's office. This report, submitted on April 17, 2026, concerns a security incident that occurred on October 2, 2025.

The bank indicated that digital attackers managed to access critical consumer files within its network. While the specific types of information involved were not detailed in the filing, the incident compromised personal information maintained by the financial institution. The total number of individuals affected by this event has also not been publicly disclosed in the filing.

Unauthorized access to personal information creates potential risks for those whose data was exposed. Such incidents can lead to various forms of misuse, including attempts at identity theft or financial fraud, as bad actors may try to leverage the compromised data.

Individuals who receive direct notification from Columbia Bank about this incident should remain vigilant. It is generally recommended to carefully review financial statements and account activity for any suspicious transactions. Monitoring credit reports can also help to detect any unauthorized activity that might arise from the breach.

This information is based on the official data breach report submitted by Columbia Bank to California regulators.