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.
5,310
Disclosures in the tracker, all years
2,025
Of those, indexed in 2026
76
Added in October
22
Added in the last 7 days
7
Sectors covered
Source: LeakTrace disclosure tracker, 20 Oct 2026. Counts of records in the index, not estimates. Software advisories and security news are not counted.
4,007 results · Disclosures in 2026. Clear filters
High31 Jul 2026
Huntsville Hospital Health System
Healthcare · Records not stated
Third-party data breach exposed patient information at multiple facilities
31 Jul 2026
Critical31 Jul 2026
PEAR ransomware attack
Healthcare · 1,260,000 records
PEAR ransomware attack exposed 1.26 million patient records from medical billing company
31 Jul 2026
High31 Jul 2026
Organisation not named
Retail · Records not stated
The disclosure as indexed does not name the organisation.
Data breach affecting customers with $40M settlement in class action
31 Jul 2026
High31 Jul 2026
Unauthorized access causing compromised information; breach response ongoing
Government · Records not stated
Unauthorized access causing compromised information; breach response ongoing
31 Jul 2026
High31 Jul 2026
Synnovis NHS Trust
Healthcare · 900,000 records
Thousands of patient records stolen in major ransomware attack affecting Mid South Essex NHS
31 Jul 2026
Critical31 Jul 2026
ANTS (France ID Agency)
Government · 19,000,000 records
Cyberattack exposed 19 million records from French identity agency
31 Jul 2026
Critical31 Jul 2026
Bankinter (EVO Banco)
Finance · 1,270,000 records
API vulnerability exposed financial and identity data of 1.27 million records in 2024
31 Jul 2026
Critical31 Jul 2026
MCBS
Healthcare · 1,200,000 records
Data breach affects 1.2 million individuals at Atlanta-based medical business management company
31 Jul 2026
Critical31 Jul 2026
Network breach
Healthcare · 1,260,000 records
Network breach exposed sensitive data affecting 1.26 million people at healthcare billing company
31 Jul 2026
Critical31 Jul 2026
Toppan
Technology · Records not stated
Supply chain breach exposing vulnerabilities affecting Singapore citizens, banks, and institutions
31 Jul 2026
High31 Jul 2026
FirstClass Travel Agency
Sector not stated · Records not stated
Australian travel agency breached; customer records compromised
31 Jul 2026
Critical31 Jul 2026
French Telecom Subsidiaries
Technology · Records not stated
Data breach with cybersecurity vulnerabilities; fined €42 million by French regulator
31 Jul 2026
High31 Jul 2026
PNC Bank
Finance · 740,000 records
740,000 records exposed due to improper security and safeguarding of personally identifiable information
31 Jul 2026
High31 Jul 2026
FinWise
Finance · 689,000 records
689,000 users' unencrypted data accessed by former employee
31 Jul 2026
Critical31 Jul 2026
McLaren Health Care
Healthcare · Records not stated
Two ransomware breaches in 2023-2024 affected 3.2+ million patients, $14M settlement
31 Jul 2026
High31 Jul 2026
EY Vendor
Finance · Records not stated
Third-party vendor breach exposed tax client data after 15-day intrusion
31 Jul 2026
High31 Jul 2026
Organisation not named
Retail · Records not stated
The disclosure as indexed does not name the organisation.
Data security incident affecting personal information, $40M settlement reached
31 Jul 2026
Critical31 Jul 2026
Meta (Facebook)
Technology · Records not stated
2019 breach exposed hundreds of millions of Facebook passwords
31 Jul 2026
High31 Jul 2026
KT Corporation
Sector not stated · Records not stated
Telecommunications company customer data breach in South Korea, resulted in $39M fine
31 Jul 2026
Critical31 Jul 2026
MCBS
Healthcare · 1,260,000 records
Medical billing firm breach exposed sensitive healthcare data for 1.26 million people
31 Jul 2026
Critical31 Jul 2026
KT Corp
Technology · Records not stated
Data breach resulting in massive fine from South Korea's Personal Information Protection Commission
31 Jul 2026
High31 Jul 2026
Cell C
Technology · Records not stated
Data breach confirmed following 2024 cyberattack affecting major South African telecom provider
31 Jul 2026
High31 Jul 2026
Partnered Health
Healthcare · Records not stated
Australian healthcare provider breach exposed personal information and medical details across 21 clinics
31 Jul 2026
Critical31 Jul 2026
U.S. Government Agencies
Government · Records not stated
Thousands of civil servants' passwords exposed since early 2024 including White House-linked passwords
31 Jul 2026
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