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.
5,276
Disclosures in the tracker, all years
1,989
Of those, indexed in 2026
34
Added in October
11
Added in the last 7 days
7
Sectors covered
Source: LeakTrace disclosure tracker, 13 Oct 2026. Counts of records in the index, not estimates. Software advisories and security news are not counted.
3,942 results · Disclosures in 2026. Clear filters
Critical22 Sep 2026
Ransomware attack
Healthcare · 1,200,000 records
Ransomware attack exposed personal data of 1.2 million individuals
22 Sep 2026
Critical22 Sep 2026
Marquis Software Solutions
Finance · Records not stated
Ransomware attack exposed 788,000 financial records including names, addresses, and card numbers
22 Sep 2026
Critical22 Sep 2026
AT&T
Technology · 109,000,000 records
Data breach exposed over 100 million customers across two separate incidents in 2024
22 Sep 2026
Critical22 Sep 2026
Intesa Sanpaolo S.p.A.
Finance · Records not stated
Employee unlawfully accessed customer data for over 2 years; fined €31.8m
22 Sep 2026
Critical22 Sep 2026
MCBS
Healthcare · 1,200,000 records
Data breach at Atlanta-based medical business management company affected 1.2 million individuals
22 Sep 2026
Critical22 Sep 2026
Medical Billing Company (unnamed)
Healthcare · 1,300,000 records
Ransomware attack exposed protected health data on 1.3 million people to dark web
22 Sep 2026
Critical22 Sep 2026
Canadian Tire
Retail · 42,000,000 records
2025 data breach exposed 42 million records
22 Sep 2026
Critical22 Sep 2026
Qantas
Sector not stated · Records not stated
Human error exposed 5.7 million passenger records
22 Sep 2026
Critical22 Sep 2026
Coupang
Retail · 33,700,000 records
Data breach exposed 33.7 million accounts, resulting in $409 million fine from South Korea
22 Sep 2026
High22 Sep 2026
Huntsville Hospital Health System
Healthcare · Records not stated
Third-party data breach exposed patient information at multiple hospital facilities
22 Sep 2026
Critical22 Sep 2026
T-Mobile
Technology · 76,600,000 records
2021 cyberattack exposed data of 76.6 million people including SSNs and driver's license info
22 Sep 2026
Critical22 Sep 2026
EVO Banco (Bankinter)
Finance · 1,270,000 records
API vulnerability exposed financial and identity data of 1.27 million people in Spain
22 Sep 2026
High22 Sep 2026
Veradigm
Healthcare · Records not stated
Third party data breach; hackers threatened to publish exposed data
22 Sep 2026
High22 Sep 2026
Spain's AEPD
Government · Records not stated
First confirmed breach blamed on autonomous AI agent; breach notification filed
22 Sep 2026
Critical22 Sep 2026
Instructure (Canvas platform)
Education · Records not stated
Supply chain breach generated 58% of all breach notices in 2026; affected education sector
22 Sep 2026
High22 Sep 2026
Tishman Speyer
Sector not stated · Records not stated
Data breach exposed Social Security numbers and personal information
22 Sep 2026
Critical22 Sep 2026
LimeLeads
Government · 17,838,396 records
17,838,396 records exposed, Email addresses, Employers, Geographic locations, Job titles and 1 more
22 Sep 2026
Medium21 Sep 2026
BigCommerce
Retail · Records not stated
Ecommerce platform BigCommerce has alerted multiple merchants to data breaches after attackers compromised credentials for third-party Ribon applications and used them to inject malicious scripts into online stores.
21 Sep 2026
High21 Sep 2026
Woodfords Family Services
Healthcare · Records not stated
Ransomware attack affecting patients and families
21 Sep 2026
Critical21 Sep 2026
DISA Global Solutions
Sector not stated · 3,300,000 records
3.3 million people affected by data breach
21 Sep 2026
High21 Sep 2026
Monroe University
Education · 320,000 records
320K+ records exposed in hacker attack
21 Sep 2026
Critical21 Sep 2026
Free Mobile
Technology · Records not stated
Major data theft, fined €49 million by French CNIL
21 Sep 2026
High21 Sep 2026
Dell
Technology · Records not stated
Data breach with sensitive user data exposed
21 Sep 2026
High21 Sep 2026
Sax
Finance · Records not stated
Top US accounting firm discloses 2024 data breach impacting 220,000
21 Sep 2026
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