Yale New Haven Health Data Breach History

This page tracks the Yale New Haven Health data breach history and cybersecurity incidents affecting Yale New Haven Health (United States). BreachHistory currently indexes 2 publicly disclosed or catalogued incidents spanning 2025, with approximately 11.1 million records reported as exposed across all indexed events. These totals may include overlapping datasets or third-party estimates and should not be interpreted as unique affected users.

The Yale New Haven Health breach timeline includes major data breaches, cyber attacks, data leaks, credential exposures, API abuse, and other security incidents. Each incident provides details on the estimated records exposed, attack method, affected data types, and supporting public sources. Currently, 0 incidents are company-confirmed.

Largest Yale New Haven Health Data Breaches

The largest indexed incidents include the 2025 Yale New Haven Health — 5.6M patient records and the 2025 Hacking incident — 5.5M patients. Record counts originating from threat actors or leak sites should be treated as estimates unless confirmed by Yale New Haven Health or a regulator. Below is the list of large data breaches:

• 2025 2025 Yale New Haven Health — 5.6M patient records — about 5.6M records exposed · Catalogued incident
• 2025 2025 Hacking incident — 5.5M patients — about 5.5M records exposed · Catalogued incident

What Information Was Exposed?

Depending on the incident, exposed data may include email addresses, Social Security numbers and national IDs, phone numbers, names, physical addresses, health and medical (PHI) records, and other personal information (PII). The exact data varies between incidents, so review each breach page before assuming your information was affected.

Yale New Haven Health Data Breach 2026

At the time of this update, no Yale New Haven Health data breach has been catalogued for 2026. New incidents are added as official disclosures, regulatory filings, or credible cybersecurity reports become available.

What To Do If You Were Affected

If you believe your account may have been involved in a Yale New Haven Health data breach, change any reused passwords, enable multi-factor authentication (MFA), monitor your account for suspicious activity, and be cautious of phishing emails or fake breach notifications.

This Yale New Haven Health breach history is maintained by BreachHistory using public disclosures, regulatory filings, security research, and clearly labelled third-party claims. For the complete breach timeline, records exposed, incident details, and AI Breach Risk Score, explore the sections on this page.