Disclosure tracker › Disclosures in 2026
Intelligence · Disclosure tracker
Disclosures in 2026
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.
5,280
Disclosures in the tracker, all years
1,993
Of those, indexed in 2026
39
Added in October
9
Added in the last 7 days
7
Sectors covered
Source: LeakTrace disclosure tracker, 15 Oct 2026. Counts of records in the index, not estimates. Software advisories and security news are not counted.
3,947 results · Disclosures in 2026. Clear filters
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
High1 May 2026
Atrium Health Navicent
Healthcare · Records not stated
Patient records system experienced data breach, potentially exposing patients' personal information and medical records
1 May 2026
Critical1 May 2026
Foxconn
Technology · Records not stated
Cyberattack on North American facilities with claims of stolen Apple and Nvidia data (8TB claimed)
1 May 2026
Critical1 May 2026
Canvas
Education · 275,000,000 records
Educational platform breach claims 275 million records; ShinyHunters gang reached deal to delete stolen data
1 May 2026
Critical1 May 2026
African National Congress (ANC)
Sector not stated · Records not stated
2 million private member records exposed and sold by hacker group
1 May 2026
High1 May 2026
Organisation not named
Education · Records not stated
The disclosure as indexed does not name the organisation.
Ransomware attack affecting Canvas login system across thousands of universities
1 May 2026
Critical1 May 2026
Canvas
Education · 275,000,000 records
ShinyHunters hacking group claimed theft of data from educational platform affecting 275 million users
1 May 2026
Critical1 May 2026
African National Congress (ANC)
Sector not stated · Records not stated
Data breach exposed 2 million private member records sold by hacker group
1 May 2026
High1 May 2026
Organisation not named
Education · Records not stated
The disclosure as indexed does not name the organisation.
Ransomware attack affecting Canvas login systems at thousands of universities
1 May 2026
High1 May 2026
Roanoke (City/Organization)
Government · Records not stated
Phishing email breach exposed Social Security numbers and passport numbers
1 May 2026
Critical1 May 2026
Canvas (Instructure)
Education · 275,000,000 records
Data breach involving 275M records from educational platform, hackers agreed to delete stolen data
1 May 2026
Critical1 May 2026
ANC (African National Congress)
Government · Records not stated
Data breach exposed 2 million private member records sold by hacker group
1 May 2026
Critical1 May 2026
Conduent
Healthcare · 62,200,000 records
62.2 million records exposed, third-largest US healthcare breach ever
1 May 2026
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