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 from flagship medical research project exposed online multiple times
1 Mar 2026
Critical1 Mar 2026
UK BioBank
Healthcare · Records not stated
Confidential health records from medical research project exposed online
1 Mar 2026
Critical1 Mar 2026
UnitedHealthcare
Healthcare · Records not stated
One of the largest healthcare data breaches in American history involving multiple companies
1 Mar 2026
Critical1 Mar 2026
LiteLLM
Technology · Records not stated
Supply chain attack exposed over 430,000 CI/CD pipelines affecting over 2,500 organizations
1 Mar 2026
Critical1 Mar 2026
Conduent
Sector not stated · Records not stated
Breach compromised personal data of millions nationwide, notifications sent a year later
1 Mar 2026
Critical1 Mar 2026
Organisation not named
Healthcare · 1,200,000 records
The disclosure as indexed does not name the organisation.
Ransomware attack exposing personal data of 1.2 million individuals
1 Mar 2026
Critical1 Mar 2026
GuardDog
Healthcare · Records not stated
Telehealth company accessed and shared patient medical records from Epic platform with law firms without authorization
1 Mar 2026
Critical1 Mar 2026
CISA (US Agency)
Government · Records not stated
Breached through Cisco vulnerability, FIRESTARTER backdoor allowed persistent access through March
1 Mar 2026
Critical1 Mar 2026
Marquis
Finance · 672,000 records
Ransomware attack stole personal and financial data of over 672,000 people from fintech company
1 Mar 2026
High1 Mar 2026
Organisation not named
Education · Records not stated
The disclosure as indexed does not name the organisation.
Driver's license numbers and voter information from Multiethnic Cohort Study exposed in ransomware attack
1 Mar 2026
Critical1 Mar 2026
Fortinet FortiGate
Technology · Records not stated
73,932 FortiGate systems exposed with valid administrative and VPN credentials
1 Mar 2026
High1 Mar 2026
Multiethnic Cohort Study data
Education · Records not stated
Multiethnic Cohort Study data leaked following ransomware attack including driver's license numbers
1 Mar 2026
Critical1 Mar 2026
CISA (US Government)
Government · Records not stated
US agency breached through Cisco vulnerability, FIRESTARTER backdoor malware allowed persistent access through March
1 Mar 2026
High1 Mar 2026
Ransomware attack data
Education · Records not stated
Ransomware attack data leak from Multiethnic Cohort Study exposed driver's license numbers and voter registration data
1 Mar 2026
Critical1 Mar 2026
TriZetto (Year-long hack)
Healthcare · 3,400,000 records
Year-long network hack exposed records on 3.4 million people
1 Mar 2026
High1 Mar 2026
Foster City Government
Government · Records not stated
Ransomware attack forced city computer systems offline for days
1 Mar 2026
Critical1 Mar 2026
CISA (US Department)
Government · Records not stated
Breached through Cisco vulnerability; FIRESTARTER backdoor allowed persistent access through March 2026
1 Mar 2026
High1 Mar 2026
Partnered Health
Healthcare · Records not stated
Personal information and medical details breached across 21 clinics in Australian healthcare provider attack
1 Mar 2026
High1 Mar 2026
Organisation not named
Legal · 13,000 records
The disclosure as indexed does not name the organisation.
13,000 patient records in New Jersey exposed through cyberattack on law firm representing state hospitals
1 Mar 2026
High1 Mar 2026
Ransomware attack resulted in data
Education · Records not stated
Ransomware attack resulted in data leak including driver's license numbers and voter registration data
1 Mar 2026
Critical1 Mar 2026
Canada Life
Finance · 5,500,000 records
Threat actor claimed 5.5 million records allegedly tied to Canada's biggest insurer for sale on cybercrime marketplace
1 Mar 2026
High1 Mar 2026
Ericsson
Technology · 15,661 records
Vishing attack exposed data of 15,661 people including SSNs, financial and medical records
1 Mar 2026
High1 Mar 2026
Lehigh Carbon Community College
Education · Records not stated
Data breach caused extended school closure, extent of exposure unclear
1 Mar 2026
Critical1 Mar 2026
Organisation not named
Government · Records not stated
The disclosure as indexed does not name the organisation.
US agency breached through Cisco vulnerability; FIRESTARTER backdoor allowed persistent access through March 2026
1 Mar 2026
Were you affected?