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.
5,278
Disclosures in the tracker, all years
1,991
Of those, indexed in 2026
37
Added in October
8
Added in the last 7 days
7
Sectors covered
Source: LeakTrace disclosure tracker, 14 Oct 2026. Counts of records in the index, not estimates. Software advisories and security news are not counted.
3,945 results · Disclosures in 2026. Clear filters
Critical1 Mar 2026
UK Biobank
Healthcare · Records not stated
Confidential health records exposed online and offered for sale on Chinese website
1 Mar 2026
Medium1 Mar 2026
Foster City
Government · Records not stated
Ransomware attack forced city computer system offline for days; state of emergency declared
1 Mar 2026
Critical1 Mar 2026
UK Biobank
Healthcare · Records not stated
Confidential health records from flagship medical research project leaked multiple times and exposed online
1 Mar 2026
High1 Mar 2026
UK Biobank
Healthcare · Records not stated
Confidential health records from medical research project exposed online and offered for sale on Chinese website
1 Mar 2026
High1 Mar 2026
Companies House (UK)
Government · Records not stated
Data exposed during five-month security issue; all UK firms urged to check records
1 Mar 2026
Critical1 Mar 2026
PIH Health
Healthcare · 2,950,000 records
2024 hacking incident notifying 2.95 million patients
1 Mar 2026
High1 Mar 2026
Loblaw
Retail · Records not stated
Data breach affecting Canadian customers at Loblaw-owned stores
1 Mar 2026
Critical1 Mar 2026
CareCloud
Healthcare · Records not stated
Electronic health records of patients leaked after unauthorized access to healthcare software systems
1 Mar 2026
High1 Mar 2026
Lehigh Carbon Community College
Education · Records not stated
Data breach caused extended school closure, extent undetermined
1 Mar 2026
High1 Mar 2026
CommonSpirit Health
Healthcare · 19,027 records
Data breach exposed medical and personal data of 19,027 patients
1 Mar 2026
Critical1 Mar 2026
TriZetto Provider Solutions
Healthcare · 3,400,000 records
Year-long unauthorized access to IT environment exposed PHI of 3.4 million individuals
1 Mar 2026
Critical1 Mar 2026
UK BioBank
Healthcare · Records not stated
Confidential health records from medical research project exposed online multiple times
1 Mar 2026
Critical1 Mar 2026
UK Biobank
Healthcare · Records not stated
Confidential health records from flagship medical research project exposed online, with data leaked multiple times
1 Mar 2026
Critical1 Mar 2026
UK BioBank
Healthcare · 500,000 records
Confidential health records from medical research project exposed online; 500K+ records
1 Mar 2026
Critical1 Mar 2026
UK Biobank
Healthcare · Records not stated
Confidential health records from medical research project exposed online multiple times
1 Mar 2026
High1 Mar 2026
Loblaw
Retail · Records not stated
Data breach affecting Canadian customers of Loblaw-owned stores
1 Mar 2026
High1 Mar 2026
CareCloud
Healthcare · Records not stated
Electronic health records of patients leaked after hackers accessed healthcare software systems
1 Mar 2026
Critical1 Mar 2026
LexisNexis
Legal · 400,000 records
400K users exposed including federal judges and .gov accounts via cloud system breach
1 Mar 2026
High1 Mar 2026
Lehigh Carbon Community College
Education · Records not stated
Data breach prompted school closure; extent of breach not fully disclosed
1 Mar 2026
High1 Mar 2026
CommonSpirit Health
Healthcare · 19,027 records
Healthcare consulting company data breach exposed 19,027 patient records and medical information
1 Mar 2026
High1 Mar 2026
DGFiP (French tax authority)
Government · 678,000 records
678,000 people and businesses affected, compromised credentials exposed tax and business info
1 Mar 2026
Critical1 Mar 2026
RingCentral
Technology · 1,600,000 records
1.6 million customer records exposed in data leak
1 Mar 2026
Critical1 Mar 2026
IDMerit
Technology · Records not stated
1 billion identity records exposed due to unprotected database
1 Mar 2026
Critical1 Mar 2026
TriZetto
Healthcare · 3,400,000 records
Year-long hack exposed records on 3.4 million people
1 Mar 2026
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