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
African National Congress (ANC)
Sector not stated · Records not stated
2 million private member records exposed and sold by hacker group on dark web
1 May 2026
High1 May 2026
Canvas
Education · Records not stated
Massive data breach affecting schools and colleges nationwide; causes exam postponements
1 May 2026
Critical1 May 2026
DentaQuest
Healthcare · 15,000,000 records
15 million patients impacted; largest healthcare data breach of 2026, breached in May
1 May 2026
High1 May 2026
7-Eleven
Retail · Records not stated
Data breach confirmed after ShinyHunters claims; documents related to franchises compromised
1 May 2026
High1 May 2026
Canvas
Education · Records not stated
Massive data breach affecting schools and colleges nationwide; University of Illinois and Illinois State University impacted
1 May 2026
High1 May 2026
7-Eleven
Retail · Records not stated
Data breach confirmed; hackers breached system storing franchise-related documents
1 May 2026
Critical1 May 2026
African National Congress (ANC)
Sector not stated · Records not stated
Data breach exposed 2 million private member records offered for sale by hacker group
1 May 2026
High1 May 2026
Idaho State University
Education · Records not stated
Ransomware attack disrupted operations and finals week at the university and thousands of other schools
1 May 2026
High1 May 2026
Canvas
Education · Records not stated
Massive data breach affecting schools nationwide, disrupted classes and coursework at universities
1 May 2026
High1 May 2026
Queensland Schools
Education · Records not stated
Tens of thousands of students and teachers affected in one of most significant education tech breaches
1 May 2026
High1 May 2026
Atrium Health Navicent
Healthcare · Records not stated
Patient records system experienced data breach potentially exposing patient records and personal information.
1 May 2026
Critical1 May 2026
Foxconn
Technology · Records not stated
8 terabytes of data stolen in ransomware attack on electronics manufacturing facilities
1 May 2026
Critical1 May 2026
NYC Health + Hospitals
Healthcare · Records not stated
Biometrics, diagnoses, and bank details exposed via third-party vendor breach lasting months
1 May 2026
High1 May 2026
Huntsville Hospital Health System
Healthcare · Records not stated
Third-party data breach exposed patient information at Huntsville Hospital facilities
1 May 2026
Critical1 May 2026
DentaQuest
Healthcare · 15,000,000 records
Largest US healthcare data breach of 2026; 15 million patients affected with SSNs and health data exposed
1 May 2026
Critical1 May 2026
Canvas (Instructure)
Education · 275,000,000 records
ShinyHunters breach exposed approximately 275 million records from educational platform
1 May 2026
High1 May 2026
Instructure (Canvas)
Education · Records not stated
Ransomware breach with reported payment to threat actors after dark web data leak
1 May 2026
High1 May 2026
7-Eleven
Retail · Records not stated
System breach exposing documents related to franchises confirmed after ShinyHunters claims
1 May 2026
High1 May 2026
Canvas
Education · Records not stated
Data extortion attack affecting education technology platform; disrupted schools and colleges nationwide
1 May 2026
Critical1 May 2026
DentaQuest
Healthcare · Records not stated
Dental benefits administrator breach affecting 15 million with SSNs and health data exposed
1 May 2026
Critical1 May 2026
Canvas
Education · 275,000,000 records
Educational platform breach by ShinyHunters threatening to leak 275 million records
1 May 2026
High1 May 2026
7-Eleven
Retail · Records not stated
System storing franchise documents breached by ShinyHunters, data exposure confirmed
1 May 2026
Critical1 May 2026
Instructure (Canvas)
Education · Records not stated
Massive data breach affecting Canvas learning management system; millions of students' personal data stolen nationwide
1 May 2026
Critical1 May 2026
DentaQuest
Healthcare · 15,000,000 records
15 million patients affected; largest 2026 US health breach exposed SSNs and dental/vision health info
1 May 2026
Were you affected?