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
96
Added in October
23
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.
Critical1 May 2026
DentaQuest
Healthcare · Records not stated
Largest healthcare data breach of 2026 impacted 15 million dental patients
1 May 2026
Critical1 May 2026
Instructure (Canvas)
Education · 275,000,000 records
Data breach exposed 275 million records from educational platform affecting schools nationwide
1 May 2026
High1 May 2026
Canvas
Education · Records not stated
Education technology platform disrupted by data extortion attack affecting schools and colleges
1 May 2026
Critical1 May 2026
Queensland schools
Education · Records not stated
Tens of thousands of Queensland students and teachers data exposed in major education technology breach
1 May 2026
Critical1 May 2026
NYC Health + Hospitals
Healthcare · 1,800,000 records
Hackers stole medical data, fingerprints and personal information affecting 1.8 million people
1 May 2026
High1 May 2026
Atrium Health Navicent
Healthcare · Records not stated
Patient records system breach potentially exposed personal and medical data
1 May 2026
Critical1 May 2026
African National Congress (ANC)
Sector not stated · Records not stated
2M private member records exposed and sold by hacker group
1 May 2026
High1 May 2026
Canvas (Learning Management System)
Education · Records not stated
Data extortion attack targeting education platform disrupted schools and colleges nationwide
1 May 2026
High1 May 2026
Canvas
Education · Records not stated
Data extortion attack on education technology platform affecting schools and colleges nationwide
1 May 2026
High1 May 2026
Iliad Italia
Technology · Records not stated
Customer records, device registration, subscription data offered on dark web
1 May 2026
High1 May 2026
Wiley Rein
Legal · Records not stated
Law firm breach exposed sensitive personal data, linked to Chinese hackers
1 May 2026
High1 May 2026
Atrium Health Navicent
Healthcare · Records not stated
Patient records system experienced data breach potentially exposing patients' records and personal information
1 May 2026
Critical1 May 2026
Foxconn
Technology · Records not stated
Ransomware group stole approximately 8 terabytes of data from North American facilities
1 May 2026
Critical1 May 2026
DentaQuest
Healthcare · 15,000,000 records
15 million patients impacted in largest healthcare data breach of 2026 in May
1 May 2026
High1 May 2026
Iliad Italia
Technology · Records not stated
Customer records, device registration, and subscription data offered on dark web
1 May 2026
Critical1 May 2026
NYC Health + Hospitals
Healthcare · 1,800,000 records
Hackers stole medical data, fingerprints, and personal information affecting at least 1.8 million people
1 May 2026
High1 May 2026
Atrium Health Navicent
Healthcare · Records not stated
Patient records system data breach potentially exposed patient records and personal information
1 May 2026
Critical1 May 2026
Foxconn
Technology · Records not stated
Ransomware attack stole approximately 8 terabytes of data
1 May 2026
High1 May 2026
ADT
Technology · 30,814 records
Data breach exposing customer personally identifiable information
1 May 2026
High1 May 2026
Canvas (education platform)
Education · Records not stated
Data extortion attack targeting education technology platform disrupted schools and colleges nationwide
1 May 2026
Critical1 May 2026
DentaQuest
Healthcare · 15,000,000 records
15 million patients affected; largest healthcare data breach of 2026 at dental benefits administrator
1 May 2026
High1 May 2026
Canvas (Instructure)
Education · Records not stated
Ransomware attack affected Canvas learning management system at universities nationwide during finals week
1 May 2026
High1 May 2026
Queensland schools
Education · Records not stated
Tens of thousands of Queensland students and teachers affected in major education technology data breach
1 May 2026
High1 May 2026
UC Berkeley
Education · 600,000 records
ShinyHunters cybercrime group claimed 600K records stolen from Canvas learning management platform
1 May 2026
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