Oncology Institute Discloses Data Breach
The Oncology Institute confirmed that patient information was impacted in a cybersecurity incident involving a third-party software provider. The incident, which was initially disclosed in November 2025, was confirmed to impact patient data on May 20, 2026, by Kroll, the third-party administrator for the vendor. The breach potentially exposed sensitive patient information, including medical and personal records.
Signal context
First seen: May 25, 2026
Last updated: Jun 25, 2026
Status: Public signal
Key points
- Patient information impacted.
- Involved a third-party software provider (possibly TriZetto).
- Kroll notified the company on May 20, 2026, about the data impact.
Signal analysis
BetaThis analysis groups the signal by industry, likely incident action and impacted security area. It helps compare this signal with other published signals without treating the labels as final determinations.
Sector: Information
Likely country: Location not provided
The feed marks multiple actor roles. Treat this as a review signal rather than a final attribution.
- Source type: outside the affected organization
- Source type: supplier or third-party involvement
Impact area: Confidentiality
Likely asset: User or customer data
- 29 signals in the same sector
- 93 signals with the same likely impact area
- 1 signal linked to this organization/domain
External sources
Third-Party Cyberattack Impacts Patient Information at The Oncology Institutehttps://securityaffairs.com/146549/data-breach/the-oncology-institute-data-breach.htmlPublic source from securityaffairs.com.
The Oncology Institute reports patient data potentially exposed in third-party vendor breachhttps://www.scmagazine.com/brief/the-oncology-institute-reports-patient-data-potentially-exposed-in-third-party-vendor-breachPublic source from scmagazine.com.
Biggest Cyber Attacks, Data Breaches, Ransomware Attacks of May 2026https://www.cm-alliance.com/cybersecurity-blog/biggest-cyber-attacks-data-breaches-ransomware-attacks-of-may-2026Public source from cm-alliance.com.
2026 Data Breaches: Cybersecurity Incidents Explained - PKWAREhttps://www.pkware.com/blog/2026-data-breachesPublic source from pkware.com.
Related signals
Grouped by why the signal is relevant.
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