DisclosureLens
HackingFinancial ServicesFinancePIIIdentity (basic)Government IDFinancial accountMediumContained

Columbia Bank

bd_cbff3120c1de99f8 · schema v1 · pii pii-v1

Severity

Medium

Discovered

—

Filed

Apr 17, 2026

To disclose

—

Affected

Not disclosed

Linked

4 filings

Confidence

89%
Full breach record for Columbia Bank →2 incidents on file

Columbia Bank notified California residents that an unknown, unauthorized third party gained access to certain Columbia Bank applications and information between October 2, 2025 and December 22, 2025. The bank engaged a forensic security firm, secured its systems, and notified law enforcement. On March 6, 2026, review concluded the data accessed contained personal information including name, Social Security number, driver's license number, and financial account number. Columbia Bank is offering affected individuals one year of Experian IdentityWorks Credit 3B monitoring. Notification was not delayed by law enforcement. The number of affected individuals is not disclosed in this sample notice.

Incident timeline

Oct 2, 2025

Begins

Mar 6, 2026

Scope determined

Apr 17, 2026

Filed

This filing is one of 4 about the same incident.View merged incident

Linked disclosures

Why this link?

Regulatory filings (3) · sorted by filing gap

Filing propagation · 4 filings · 4 states

View merged incident ↗
Oregon State AGApr 17 · first
Nebraska State AGApr 17 · first
Washington State AGApr 17 · first
California State AGApr 17 · first · this page

Evidence ladder

Leak-site claim

Attacker assertion only. Establishes: claim date, group, alleged victim.

Press / market report

Unlocks: incident narrative, operational impact. Still no compliance clock.

State AG / regulator filingThis record

Unlocks: discovery date, data types, affected count, compliance clock.

SEC 8-K / victim statement

Unlocks: materiality, stated response, full audit trail. Ceiling removed.