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.
5,491
Disclosures in the tracker, all years
2,079
Of those, indexed in 2026
142
Added in October
19
Added in the last 7 days
7
Sectors covered
Source: LeakTrace disclosure tracker, 30 Oct 2026. Counts of records in the index, not estimates. Software advisories and security news are not counted.
Medium7 May 2026
Woflow
Technology · 447,593 records
447,593 records exposed, Email addresses, Names, Phone numbers, Physical addresses
7 May 2026
Critical6 May 2026
Rapid7
Sector not stated · Records not stated
Rapid7 reveals an Iranian false flag operation masquerading as a Chaos ransomware attack
6 May 2026
High6 May 2026
LegionProxy
Technology · 10,144 records
10,144 records exposed, Email addresses, Names, Passwords, Purchases
6 May 2026
Medium5 May 2026
Vimeo
Finance · 119,167 records
119,167 records exposed, Email addresses, Names
5 May 2026
High3 May 2026
Marcus & Millichap
Government · 1,837,078 records
1,837,078 records exposed, Email addresses, Employers, Job titles, Names and 2 more
3 May 2026
High2 May 2026
ZenBusiness
Finance · 5,118,184 records
5,118,184 records exposed, Email addresses, Names, Phone numbers
2 May 2026
High1 May 2026
Canvas (Instructure)
Education · Records not stated
Ransomware attack by ShinyHunters group forced Canvas shutdown during finals week, affecting universities including Murray State.
1 May 2026
Medium1 May 2026
West Pharmaceutical Services
Healthcare · Records not stated
Ransomware attack forced systems offline globally, disrupting operations.
1 May 2026
Critical1 May 2026
Canvas (Instructure)
Education · 275,000,000 records
ShinyHunters breached Canvas, affecting schools nationwide and threatening to leak data involving 275 million people. Parent company later struck a deal with hackers to delete the data.
1 May 2026
Critical1 May 2026
Instructure (Canvas)
Education · 275,000,000 records
ShinyHunters stole data from the Canvas learning platform, affecting schools nationwide; threatened leak of data involving 275 million records. Parent company struck a deal to delete the data.
1 May 2026
Critical1 May 2026
Instructure (Canvas)
Education · 275,000,000 records
Canvas platform breach affected schools nationwide; ShinyHunters claimed 275M records. Parent company struck a deal with hackers to delete the stolen data.
1 May 2026
High1 May 2026
Canvas (Education Platform)
Education · Records not stated
Ransomware attack shut down education platform used by thousands of US universities and K-12 schools during finals week
1 May 2026
High1 May 2026
Canvas
Education · Records not stated
Ransomware attack shut down education platform used by US universities and K-12 schools
1 May 2026
Critical1 May 2026
Instructure Canvas
Education · Records not stated
Canvas learning management system breach affected millions of students' personal data
1 May 2026
High1 May 2026
Canvas
Education · Records not stated
Ransomware attack shut down education platform used by thousands of schools during finals week
1 May 2026
High1 May 2026
Atrium Health Navicent
Healthcare · Records not stated
Patient records system breach potentially exposed patient records and personal information
1 May 2026
Critical1 May 2026
DentaQuest
Healthcare · 15,000,000 records
15 million patients impacted in largest healthcare data breach of 2026; dental benefits administrator breached in May
1 May 2026
High1 May 2026
Canvas
Education · Records not stated
Ongoing data extortion attack on education technology platform affecting schools nationwide
1 May 2026
Critical1 May 2026
DentaQuest
Healthcare · 15,000,000 records
15 million patients impacted, largest healthcare data breach of 2026, occurred in May
1 May 2026
High1 May 2026
Canvas
Education · Records not stated
Education technology platform targeted by data extortion attack affecting schools nationwide
1 May 2026
Critical1 May 2026
Foxconn
Technology · Records not stated
Ransomware attack; hackers stole 8 terabytes of data from electronics manufacturer
1 May 2026
Critical1 May 2026
Canvas
Education · Records not stated
Ransomware attack shut down education platform used by thousands of universities and K-12 schools during finals week
1 May 2026
High1 May 2026
Canvas (education platform)
Education · Records not stated
Ransomware attack shut down platform used by thousands of schools and universities
1 May 2026
High1 May 2026
Canvas
Education · Records not stated
Data extortion attack on education platform disrupted schools and colleges nationwide
1 May 2026
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