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.
5,287
Disclosures in the tracker, all years
2,001
Of those, indexed in 2026
49
Added in October
9
Added in the last 7 days
7
Sectors covered
Source: LeakTrace disclosure tracker, 17 Oct 2026. Counts of records in the index, not estimates. Software advisories and security news are not counted.
3,968 results · Disclosures in 2026. Clear filters
Critical31 Jul 2026
MCBS
Healthcare · 1,200,000 records
Data breach affecting 1.2 million individuals at Atlanta-based medical business management company
31 Jul 2026
High31 Jul 2026
Illuminate Education
Education · Records not stated
Data breach at Wisconsin-based edtech company; settled with FTC requiring implementation of security program
31 Jul 2026
High31 Jul 2026
Thailand Ministry of Finance
Government · Records not stated
Hackers used autonomous AI agent for cyber-espionage campaign
31 Jul 2026
High31 Jul 2026
KT Corporation
Technology · Records not stated
Customer data breach at South Korean telecommunications company, fined $39 million
31 Jul 2026
Critical31 Jul 2026
PIH Health
Healthcare · 2,950,000 records
2024 ransomware hacking incident exposed 2.95 million patient records
31 Jul 2026
High31 Jul 2026
FRANCE TRAVAIL
Government · Records not stated
Hackers breached information system in Q1 2024, resulting in €5 million fine from CNIL
31 Jul 2026
High31 Jul 2026
TransUnion
Finance · 37,000 records
2019 breach exposed 37,000 people's credit and personal data
31 Jul 2026
High31 Jul 2026
Mizuno
Retail · Records not stated
Japanese sportswear company confirms data breach following 2024 ransomware attack affecting customers
31 Jul 2026
Critical31 Jul 2026
Meta
Technology · Records not stated
2018 breach resulting in €251 million GDPR fine by EU privacy regulator
31 Jul 2026
High31 Jul 2026
CommonSpirit Health
Healthcare · 19,027 records
19,027 patient records exposed with personal and medical information
31 Jul 2026
High31 Jul 2026
Essex NHS Trust
Healthcare · 900,000 records
Thousands of patient records stolen in ransomware cyberattack by Synnovis
31 Jul 2026
Critical31 Jul 2026
TriZetto
Healthcare · 3,400,000 records
3.4 million people's health and personal data stolen in 2024 cyberattack
31 Jul 2026
Critical31 Jul 2026
US Government Agencies
Government · Records not stated
Thousands of civil servants' passwords exposed since early 2024, including White House linked passwords
31 Jul 2026
High31 Jul 2026
Gaming Accounts (Multiple)
Technology · Records not stated
11 million gaming account credentials exposed
31 Jul 2026
Critical31 Jul 2026
Medical Billing Company (Unnamed)
Healthcare · 1,300,000 records
2025 ransomware attack exposed protected health data of 1.3 million people leaked to dark web
31 Jul 2026
High31 Jul 2026
Tribeca Festival
Sector not stated · 666,000 records
Data leak exposed 666,000 records including celebrity contact information
31 Jul 2026
Critical31 Jul 2026
Charter Spectrum
Technology · 42,000,000 records
Data breach exposed 4.9M confirmed accounts; ShinyHunters claims 42M records stolen
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
UnitedHealthcare
Healthcare · Records not stated
2024 cyberattack exposed sensitive health and insurance data from millions of patients
31 Jul 2026
Critical31 Jul 2026
Medical Billing Company (unnamed)
Healthcare · 1,300,000 records
2025 ransomware attack exposed protected health data on 1.3 million people; leaked to dark web
31 Jul 2026
Critical31 Jul 2026
McLaren Health Care
Healthcare · Records not stated
Two ransomware breaches in 2023-2024 affected 3.2 million victims; settled lawsuit for $14M
31 Jul 2026
High31 Jul 2026
Transport for London
Government · Records not stated
Cyber attack on London transport network infrastructure cost £39M; two hackers jailed
31 Jul 2026
Critical31 Jul 2026
Qantas
Sector not stated · 5,670,000 records
Vishing attack exposed 5.67 million customer records
31 Jul 2026
High31 Jul 2026
South Florida Injury Centers
Healthcare · 1,525 records
Data breach exposed SSNs and medical records of 1,525 individuals
31 Jul 2026
Were you affected?