Government Data Breaches

The Bureau of Alcohol, Tobacco, Firearms and Explosives (ATF) reportedly experienced a data breach on August 26, 2026, according to ransomware tracker reports.

The City of Mitchell experienced a data breach on August 24, 2026, according to a ransomware tracker. The full extent of the breach is currently unknown.

Otter Tail County, Minnesota data breach in 2026 was listed by a ransomware tracker, but the incident has not been publicly confirmed by the county or a regulator. The available record does not disclose an affected count or the types of data involved.

Pierce Township data breach reports in 2026 identify the Ohio township as a claimed Rhysida victim, but the incident has not been publicly confirmed. The entity-level number of affected individuals and specific exposed personal data remain unknown.

City of Winchester data breach in 2026 was reported by ransomware.live as a Qilin victim, but the incident has not been publicly confirmed in the sources consulted. No affected-count or data-type details were available.

A RansomLook listing reported a possible City of McMinnville, Oregon data breach in 2026. The report has not been publicly confirmed by the city or a regulator, and no affected-person count or data types have been disclosed.

City of Beacon data breach 2026 was reported on ransomware.live, but the incident has not been publicly confirmed by the city in the material reviewed.

City of McMinnville OR data breach in 2026 was reported in a ransomware-tracker listing tied to Ransomhouse. No official confirmation, affected-count disclosure, or data-type details were provided in the available source.

A reported data breach involving New Hampshire Housing in 2026 is unconfirmed by official sources. ClassActionU reported a security incident where a landlord's email was compromised.

Talbot County Department of Emergency Services data breach was reported in 2026 on a RansomLook listing tied to the Lynx group, but the incident has not been officially confirmed. No affected count or data types were disclosed in the available source.

Virginia Peninsula Regional Jail data breach in 2026 was reported by a ransomware tracker, but it has not been publicly confirmed. The available record does not disclose the affected count or data types.

Sc Regional Housing Authority data breach in 2026 was reported only in a ransomware-tracker listing tied to the Orova group. The available source does not confirm exposed data types, affected count, or any regulator filing.

Kenaitze Indian Tribe data breach in 2026 was reported by a ransomware tracker, but the available source material does not confirm the scope or the data involved.

The Garfield County Sheriff Office experienced a data breach in July 2026, according to a ransomware tracker.

Greene County, Georgia experienced a cybersecurity incident in July 2026, though officials initially stated there was no evidence of personal data access or theft.

The City of Houston experienced a data breach in 2026, with the ExfilSquad ransomware group claiming to have exfiltrated 6 million records.

The City of Atlanta experienced an alleged data breach in July 2026, according to a ransomware leak site listing.

The Military Sealift Command experienced a data breach in July 2026, confirmed by its listing on a ransomware leak site. The full scope of affected individuals and data types remains unconfirmed.

A data leak in 2026 exposed information on approximately 6,500 federal immigration employees, including frontline agents.

The Morton Grove Park District experienced a data breach in July 2026, claimed by the Deadlock ransomware group.