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.
5,306
Disclosures in the tracker, all years
2,020
Of those, indexed in 2026
68
Added in October
18
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.
3,995 results · Disclosures in 2026. Clear filters
High1 Jul 2026
Organisation not named
Government · Records not stated
The disclosure as indexed does not name the organisation.
Network intrusion and data breach confirmed after initially ruled false positives
1 Jul 2026
Critical1 Jul 2026
MCBS Medical
Healthcare · 1,260,000 records
Medical billing company; 1.26 million patients exposed in PEAR ransomware attack affecting healthcare billing data
1 Jul 2026
High1 Jul 2026
Department for Education
Education · Records not stated
Data breach claimed by ExfilSquad group in ransomware attack
1 Jul 2026
Critical1 Jul 2026
Fortinet (FortiBleed campaign)
Technology · Records not stated
73,000+ FortiGate firewalls and VPN gateways exposed with valid admin and VPN credentials
1 Jul 2026
Critical1 Jul 2026
Organisation not named
Healthcare · 1,260,000 records
The disclosure as indexed does not name the organisation.
1.26 million patients exposed in PEAR ransomware attack on healthcare billing company
1 Jul 2026
Critical1 Jul 2026
Organisation not named
Healthcare · 1,260,000 records
The disclosure as indexed does not name the organisation.
Healthcare billing company ransomware attack exposed 1.26 million patient records in PEAR ransomware attack.
1 Jul 2026
High1 Jul 2026
KT (Korean Telecommunications)
Technology · Records not stated
Personal data breach and unauthorized micropayment damages via illegal base stations
1 Jul 2026
High1 Jul 2026
Department for Homeland Security
Government · Records not stated
Network intrusion on Homeland Security Information Network confirmed after false positives
1 Jul 2026
Critical1 Jul 2026
PEAR ransomware attack on medical billing company
Healthcare · 1,260,000 records
PEAR ransomware attack on medical billing company exposed 1.26 million patient records
1 Jul 2026
High1 Jul 2026
Network intrusion on Homeland Security Information Network
Government · Records not stated
Network intrusion on Homeland Security Information Network confirmed after false positives
1 Jul 2026
High1 Jul 2026
Cerner (Huntsville Hospital)
Healthcare · Records not stated
Patient data compromised through third-party vendor breach at Huntsville Hospital Health System
1 Jul 2026
Critical1 Jul 2026
Healthcare billing company
Healthcare · 1,260,000 records
Healthcare billing company exposed 1.26 million patient records in PEAR ransomware attack
1 Jul 2026
High1 Jul 2026
Department of Homeland Security
Government · Records not stated
Network intrusion confirmed on HSIN used for World Cup operations
1 Jul 2026
Critical1 Jul 2026
Organisation not named
Healthcare · 1,260,000 records
The disclosure as indexed does not name the organisation.
1.26 million patient records exposed in PEAR ransomware attack on billing company
1 Jul 2026
Critical1 Jul 2026
Puerto Rico Government Agency
Government · Records not stated
Cybersecurity loophole in government mapping service exposed 1 million social security numbers
1 Jul 2026
High1 Jul 2026
KT Corporation
Technology · Records not stated
Personal data breach via illegal base stations caused unauthorized micropayments
1 Jul 2026
High1 Jul 2026
Coca-Cola (Fairlife subsidiary)
Sector not stated · Records not stated
Ransomware attack resulted in theft of company data from dairy subsidiary
1 Jul 2026
Critical1 Jul 2026
Organisation not named
Healthcare · 1,260,000 records
The disclosure as indexed does not name the organisation.
1.26 million patients exposed in PEAR ransomware attack on healthcare billing and practice-management company
1 Jul 2026
Critical1 Jul 2026
MCBS Medical Billing
Healthcare · 1,260,000 records
1.26 million patients exposed in PEAR ransomware attack on billing and practice-management systems
1 Jul 2026
High1 Jul 2026
Hospital software vendor
Healthcare · Records not stated
Customer data breach from major healthcare software vendor via supply-chain attack
1 Jul 2026
Critical1 Jul 2026
Fortinet
Technology · Records not stated
FortiBleed campaign; 73,000+ devices affected; verified administrator credentials and VPN data exposed
1 Jul 2026
High1 Jul 2026
Evanston Township High School
Education · Records not stated
Cyberattack disrupted phone systems; students and parents advised to use email
1 Jul 2026
Critical1 Jul 2026
Organisation not named
Healthcare · 1,260,000 records
The disclosure as indexed does not name the organisation.
1.26 million patients exposed in PEAR ransomware attack on billing system
1 Jul 2026
High1 Jul 2026
Police National Legal Database
Government · Records not stated
135,000 contact records stolen and leaked on dark web by ExfilSquad hacker group
1 Jul 2026
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