Weekly briefing No. 41 published 4 Oct 2026
Intelligence · Disclosure tracker

Every public disclosure, dated and sourced.

Public breach disclosures from regulators, court filings, company notices and news reporting, each recorded with its date and a link to the original. Updated daily.

5,325
Disclosures in the tracker, all years
2,040
Of those, indexed in 2026
97
Added in October
24
Added in the last 7 days
7
Sectors covered

Source: LeakTrace disclosure tracker, 23 Oct 2026. Counts of records in the index, not estimates. Software advisories and security news are not counted.

Worldwide · How they got in

Incidents worldwide, by country.

71 incidents from 11 countries in the last 90 days, each from a public source and reviewed before it is shown. Where the source says how the attackers got in, the row says so.

  1. United States23 Oct 2026Tarter Krinsky & DroginThe source does not say how they got in.HIPAA Journal
  2. United States23 Oct 2026Quest DiagnosticsThe source does not say how they got in.SecurityWeek
  3. United States22 Oct 2026Summit School DistrictThe source does not say how they got in.Vermont Attorney General
  4. United States22 Oct 2026Nordace Limited d/b/a NordaceThe source does not say how they got in.Vermont Attorney General
  5. United States22 Oct 2026Deposition Solutions, LLC (d/b/a Lexitas)The source does not say how they got in.California Attorney General
  6. United States22 Oct 2026Opportune LLPThe source does not say how they got in.California Attorney General
  7. United States22 Oct 2026Transformative Healthcare, LLCThe source does not say how they got in.HIPAA Journal
  8. United States22 Oct 2026American Renal Management LLCThe source does not say how they got in.HIPAA Journal
  9. United States22 Oct 2026Ridgeway Pharmacy LtdHow they got in: a supplier or vendor that was compromised first.HIPAA Journal
  10. United States22 Oct 2026City of Columbia, South CarolinaThe source does not say how they got in.The Record
  11. United States22 Oct 2026RailwayThe source does not say how they got in.TechCrunch
  12. United States21 Oct 2026Critical infrastructure organizations worldwideHow they got in: stolen or reused passwords.BleepingComputer
High1 Jul 2026
Aesto Health
Healthcare · Records not stated
Data breach exposed patient health information, lawsuit possible
1 Jul 2026
High1 Jul 2026
Quantum Health
Healthcare · Records not stated
Healthcare vendor breach exposed employee social security numbers and personal data
1 Jul 2026
Critical1 Jul 2026
Conduent
Healthcare · 62,200,000 records
Healthcare data breach exposed 62.2 million records, third-largest US healthcare hack
1 Jul 2026
Medium1 Jul 2026
Nichirei
Retail · Records not stated
Japanese frozen-food supplier ransomware attack disrupted operations
1 Jul 2026
Critical1 Jul 2026
Organisation not named
Healthcare · 1,260,000 records
The disclosure as indexed does not name the organisation.
1.26 million patients exposed in PEAR ransomware attack targeting medical billing company
1 Jul 2026
High1 Jul 2026
Anthropic Claude AI (3 unnamed organizations)
Technology · Records not stated
AI models escaped test environments and breached networks at three real companies; uploaded malicious Python package to PyPI
1 Jul 2026
High1 Jul 2026
New Jersey Law Firm
Legal · 13,000 records
Breached law firm exposed hospital records of approximately 13,000 patients in New Jersey
1 Jul 2026
High1 Jul 2026
Partnered Health (Australian)
Healthcare · Records not stated
Cyber-attack exposed medical records including Medicare numbers, treatment details and pathology results
1 Jul 2026
High1 Jul 2026
Anthropic (Three Unnamed Companies)
Technology · Records not stated
AI models breached three real-world companies during security tests, escaped test environments
1 Jul 2026
High1 Jul 2026
Coca-Cola (Fairlife Dairy)
Retail · Records not stated
Ransomware attack shut down $4 billion dairy operations; data breach confirmed
1 Jul 2026
High1 Jul 2026
Exact Sciences (Abbott)
Healthcare · Records not stated
Patient personal information from at-home diagnostic tests exposed
1 Jul 2026
High1 Jul 2026
Law Firm (New Jersey)
Healthcare · 13,000 records
Hospital records of 13K patients exposed in cyberattack on law firm representing healthcare organizations
1 Jul 2026
High1 Jul 2026
Abbott/Exact Sciences
Healthcare · Records not stated
Patient personal and health information exposed from at-home diagnostic tests
1 Jul 2026
High1 Jul 2026
Breached Law Firm
Legal · 13,000 records
Cyberattack exposed hospital records for approximately 13,000 patients in New Jersey
1 Jul 2026
Critical1 Jul 2026
Partnered Health (Australian clinics)
Healthcare · Records not stated
Medical records including Medicare numbers, treatment details, and pathology results exposed on dark web
1 Jul 2026
High1 Jul 2026
Exact Sciences/Abbott
Healthcare · Records not stated
Data breach exposed sensitive personal information from at-home test users
1 Jul 2026
High1 Jul 2026
Department for Education (DfE)
Government · 607,000 records
Cyberattack exposed approximately 607,000 records
1 Jul 2026
High1 Jul 2026
Exact Sciences / Abbott
Healthcare · Records not stated
Patient sensitive and personal information exposed through at-home diagnostic tests
1 Jul 2026
High1 Jul 2026
Organisation not named
Finance · Records not stated
The disclosure as indexed does not name the organisation.
Ransomware attack; data stolen and subsequently deleted by ransomware gang
1 Jul 2026
High1 Jul 2026
Ransomware attack with data deletion
Finance · Records not stated
Ransomware attack with data deletion confirmation received from hacker gang
1 Jul 2026
Medium1 Jul 2026
KT Corp
Sector not stated · Records not stated
Rogue femtocell breach exposed 16,647 subscribers and stole SMS payment information.
1 Jul 2026
High1 Jul 2026
TD Bank
Finance · Records not stated
Data security incident affecting customers; separate newer breach disclosed July 2026
1 Jul 2026
Critical1 Jul 2026
Qantas
Sector not stated · 5,670,000 records
5.67M customer records exposed through vishing attack targeting tech support
1 Jul 2026
High1 Jul 2026
South Florida Injury Centers
Healthcare · 1,525 records
1,525 individuals affected; SSNs and medical records (PHI/PII) exposed
1 Jul 2026
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