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.
5,299
Disclosures in the tracker, all years
2,012
Of those, indexed in 2026
58
Added in October
15
Added in the last 7 days
7
Sectors covered
Source: LeakTrace disclosure tracker, 18 Oct 2026. Counts of records in the index, not estimates. Software advisories and security news are not counted.
3,981 results · Disclosures in 2026. Clear filters
High1 May 2026
GitHub
Technology · Records not stated
Data breach resulted in theft of 4,000 internal developer code repositories
1 May 2026
High1 May 2026
Instructure/Canvas
Education · Records not stated
Ransomware attack resulted in data breach; apparent payment made to threat actors
1 May 2026
High1 May 2026
Organisation not named
Education · Records not stated
The disclosure as indexed does not name the organisation.
Tens of thousands of student and teacher records exposed in major education technology data breach
1 May 2026
Critical1 May 2026
ANC (African National Congress)
Sector not stated · Records not stated
2 million private member records exposed and offered for sale 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.
Tens of thousands of students and teachers affected in major education technology data breach
1 May 2026
High1 May 2026
Organisation not named
Education · Records not stated
The disclosure as indexed does not name the organisation.
Tens of thousands of Queensland students and teachers' data compromised in major education technology breach
1 May 2026
High1 May 2026
FirstClass Travel
Sector not stated · Records not stated
Customer records allegedly breached by threat actor on underground forums
1 May 2026
Critical1 May 2026
PEAR ransomware attack
Healthcare · 1,260,000 records
PEAR ransomware attack exposed data for 1.26 million patients at healthcare billing company
1 May 2026
High1 May 2026
Ernst & Young
Finance · Records not stated
Vendor breach exposed tax client data after 81-day notification delay
1 May 2026
High1 May 2026
UC Berkeley Canvas/bCourses
Education · 600,000 records
ShinyHunters claimed to have stolen 600K records from UC Berkeley's learning management platform
1 May 2026
High1 May 2026
Organisation not named
Education · Records not stated
The disclosure as indexed does not name the organisation.
Tens of thousands of students and teachers affected in major global education technology data breach
1 May 2026
High1 May 2026
Queensland schools (Australia)
Education · Records not stated
Major cyber breach affecting tens of thousands of students and teachers in education technology
1 May 2026
High1 May 2026
Queensland schools
Education · Records not stated
Tens of thousands of students and teachers affected in major education technology data breach
1 May 2026
High1 May 2026
Queensland Schools (Education Technology)
Education · Records not stated
Tens of thousands of students and teachers' data exposed in education technology breach
1 May 2026
High1 May 2026
Organisation not named
Education · Records not stated
The disclosure as indexed does not name the organisation.
Tens of thousands of students and teachers affected in one of the most significant global education technology data breaches
1 May 2026
High1 May 2026
FirstClass
Retail · Records not stated
Australian travel agency; threat actor alleged customer records breach on underground hacking forums
1 May 2026
High1 May 2026
Queensland Schools (Australian Education)
Education · Records not stated
Tens of thousands of Queensland students and teachers affected in significant education technology data breach
1 May 2026
High1 May 2026
Australian schools (Queensland)
Education · Records not stated
Tens of thousands of students and teachers affected in one of most significant global education technology breaches
1 May 2026
High1 May 2026
Queensland Schools
Education · Records not stated
Tens of thousands of students and teachers affected in major education technology data breach
1 May 2026
High1 May 2026
Queensland Schools (Australia)
Education · Records not stated
Tens of thousands of students and teachers affected in education technology data breach
1 May 2026
Critical1 May 2026
Canvas
Education · 275,000,000 records
ShinyHunters breach exposed data for 275 million users; company struck deal to delete data
1 May 2026
High1 May 2026
Organisation not named
Education · Records not stated
The disclosure as indexed does not name the organisation.
Tens of thousands of Queensland students and teachers affected in major education technology data breach
1 May 2026
Critical1 May 2026
Canvas/Instructure
Education · 275,000,000 records
ShinyHunters claimed breach exposing data of 275 million users from educational platform
1 May 2026
High1 May 2026
UC Berkeley Canvas
Education · 600,000 records
ShinyHunters stole approximately 600,000 records from Canvas learning platform used by 43,000 students
1 May 2026
Were you affected?