---
schema_version: "secwatch.filing_event.v1"
accession: "0001605301-26-000021"
form_type: "8-K"
ticker: "CBFV"
cik: "0001605301"
company_name: "CB Financial Services, Inc."
filed_at: "2026-05-11T20:15:31+00:00"
generated_at: "2026-05-11T22:08:39.289788+00:00"
event_type: "cyber"
sentiment: "negative"
materiality_score: 0.9
calibrated_materiality_score: 0.9
confidence: "high"
source: SEC EDGAR
---

# CB Financial Services discloses material cyber incident exposing customer SSNs and DOBs

## Summary
- Unauthorized AI-based software exposed non-public customer data; incident discovered May 5, 2026.
- Data disclosed includes names, social security numbers, and dates of birth.
- Company deemed the incident material on May 7, 2026; investigation ongoing.
- No disruption to bank operations or customer access; financial impact not expected.
- Remediation includes strengthening controls; regulators notified.

## SEC filing metadata
- accession: 0001605301-26-000021
- form_type: 8-K
- ticker: CBFV
- cik: 0001605301
- company_name: CB Financial Services, Inc.
- filed_at: 2026-05-11T20:15:31+00:00
- event_type: cyber
- sentiment: negative
- materiality_score: 0.9
- calibrated_materiality_score: 0.9
- confidence: high
- sec_items: 1.05
- EDGAR index: https://www.sec.gov/Archives/edgar/data/1605301/000160530126000021/0001605301-26-000021-index.htm
- EDGAR primary document: https://www.sec.gov/Archives/edgar/data/1605301/000160530126000021/cbfv-20260507.htm

## Machine-readable alternates
- HTML: https://secwatch.observer/filing/0001605301-26-000021
- JSON: https://secwatch.observer/filing/0001605301-26-000021.json
- Plain text: https://secwatch.observer/filing/0001605301-26-000021.txt

This AI-assisted summary is a reading aid. Review the linked SEC EDGAR filing before relying on any specific claim.