CB Financial Services, Inc. (via subsidiary Community Bank) disclosed a material cybersecurity incident on May 7, 2026. On May 5, 2026, the Bank became aware of an internal incident involving the unauthorized use of AI-based software to handle non-public customer information, specifically names, SSNs, and dates of birth. The incident did not disrupt operations but is material due to the sensitive data volume. The investigation is ongoing, and the Company is notifying regulators and affected individuals.