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
7
Added in the last 7 days
7
Sectors covered
Source: LeakTrace disclosure tracker, 16 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
NYC Health and Hospitals
Healthcare · 1,800,000 records
Breach exposed medical records, fingerprints, and geolocation data of 1.8 million people
1 May 2026
Critical1 May 2026
Foxconn
Technology · Records not stated
Ransomware attack on North American facilities with claims of stolen Apple and Nvidia data, 8TB stolen
1 May 2026
High1 May 2026
Canvas
Education · Records not stated
Data extortion attack on education technology platform disrupting schools and colleges nationwide
1 May 2026
Critical1 May 2026
DentaQuest
Healthcare · 15,000,000 records
15M patients impacted in largest healthcare data breach of 2026; May 2026 incident
1 May 2026
Critical1 May 2026
Canvas (Instructure)
Education · 275,000,000 records
ShinyHunters breached educational platform; 275M records exposed affecting schools nationwide
1 May 2026
Critical1 May 2026
Canvas
Education · 275,000,000 records
ShinyHunters breach exposed 275 million records from educational platform affecting schools nationwide
1 May 2026
Critical1 May 2026
NYC Health + Hospitals
Healthcare · 1,800,000 records
Hackers stole biometric data including fingerprints and medical data from 1.8 million people. Network access lasted over 2 months before detection.
1 May 2026
Critical1 May 2026
Queensland schools (education technology)
Education · Records not stated
Tens of thousands of Queensland students and teachers affected in major global education technology data breach
1 May 2026
High1 May 2026
Iliad Italia
Technology · Records not stated
Customer records, device registration, and subscription data offered for sale on dark web
1 May 2026
High1 May 2026
Organisation not named
Healthcare · 900,000 records
The disclosure as indexed does not name the organisation.
NHS staff inappropriately accessed medical records of Southport attack victims; breach not disclosed for nearly two years
1 May 2026
Critical1 May 2026
ANC (African National Congress)
Sector not stated · Records not stated
Hacker group exposed 2 million private member records for sale
1 May 2026
High1 May 2026
Canvas
Education · Records not stated
Data extortion attack on education technology platform affecting schools and colleges
1 May 2026
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
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