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.
5,280
Disclosures in the tracker, all years
1,993
Of those, indexed in 2026
39
Added in October
7
Added in the last 7 days
7
Sectors covered
Source: LeakTrace disclosure tracker, 16 Oct 2026. Counts of records in the index, not estimates. Software advisories and security news are not counted.
3,947 results · Disclosures in 2026. Clear filters
Critical1 Jun 2026
Ransomware attack
Healthcare · 1,300,000 records
Ransomware attack exposed protected health data of 1.3 million people to dark web
1 Jun 2026
Critical1 Jun 2026
Organisation not named
Healthcare · 900,000 records
The disclosure as indexed does not name the organisation.
Thousands of NHS patient records stolen during major ransomware attack
1 Jun 2026
High1 Jun 2026
Synnovis (NHS Essex)
Healthcare · 900,000 records
Thousands of NHS patient records stolen in ransomware cyberattack
1 Jun 2026
Critical1 Jun 2026
Puerto Rico Government Agency
Government · Records not stated
Cybersecurity loophole exposed 1 million social security numbers in mapping service
1 Jun 2026
High1 Jun 2026
Organisation not named
Healthcare · 900,000 records
The disclosure as indexed does not name the organisation.
Thousands of NHS patient records stolen during ransomware attack
1 Jun 2026
High1 Jun 2026
Organisation not named
Healthcare · 900,000 records
The disclosure as indexed does not name the organisation.
Thousands of patient records stolen in ransomware attack affecting NHS trust
1 Jun 2026
High1 Jun 2026
Organisation not named
Healthcare · 900,000 records
The disclosure as indexed does not name the organisation.
Thousands of NHS patient records stolen in ransomware cyberattack on Essex healthcare provider
1 Jun 2026
High1 Jun 2026
Synnovis/NHS Mid South Essex
Healthcare · 900,000 records
Thousands of NHS patient records stolen in ransomware cyberattack on healthcare trust
1 Jun 2026
High1 Jun 2026
Partnered (Australian clinics)
Healthcare · Records not stated
Cyber-attack exposing sensitive medical records including Medicare numbers, treatment details, pathology results
1 Jun 2026
High1 Jun 2026
Cyberattack on law firm
Legal · 13,000 records
Cyberattack on law firm exposed hospital records for nearly 13,000 patients in New Jersey
1 Jun 2026
High1 Jun 2026
Ransomware cyberattack
Healthcare · Records not stated
Ransomware cyberattack exposed thousands of patient records
1 Jun 2026
Critical1 Jun 2026
Unknown (Elasticsearch)
Technology · Records not stated
Publicly exposed Elasticsearch database with 24 billion stolen credential records accessible to anyone
1 Jun 2026
Critical1 Jun 2026
Medical Billing Company (unnamed)
Healthcare · 1,300,000 records
Ransomware attack in 2025 exposed protected health data on 1.3 million people, leaked to dark web
1 Jun 2026
Medium1 Jun 2026
Evanston Township High School
Education · Records not stated
Ransomware attack disrupted phone systems and network services
1 Jun 2026
Critical1 Jun 2026
Synnovis/NHS (Essex)
Healthcare · 900,000 records
Thousands of NHS patient records stolen in ransomware attack affecting Mid South Essex Foundation Trust
1 Jun 2026
High1 Jun 2026
Valve
Technology · Records not stated
European logistics partner hit with data breach, customers warned of scam emails
1 Jun 2026
Critical1 Jun 2026
Thailand Digital Ministry
Government · Records not stated
221 million login records exposed, prompting MFA mandate for state systems
1 Jun 2026
High1 Jun 2026
Law firm (New Jersey)
Legal · 13,000 records
Data from 13,000 patients exposed via cyberattack on law firm representing hospitals
1 Jun 2026
Critical1 Jun 2026
Elasticsearch Database (Infostealer logs)
Technology · Records not stated
Publicly exposed database leaked 24 billion stolen credentials in June 2026, largest infostealer compilation
1 Jun 2026
Critical1 Jun 2026
Organisation not named
Healthcare · 1,260,000 records
The disclosure as indexed does not name the organisation.
1.26M patient records exposed in PEAR ransomware attack; medical billing data compromised
1 Jun 2026
Critical1 Jun 2026
MCBS Medical Billing
Healthcare · 1,260,000 records
1.26 million patients exposed in PEAR ransomware attack on medical billing company
1 Jun 2026
Critical1 Jun 2026
Instructure
Education · Records not stated
Canvas platform supply chain breach generating over 50% of all breach notices in 2026
1 Jun 2026
High1 Jun 2026
Law Firm (New Jersey)
Legal · 13,000 records
Cyberattack on law firm exposed hospital records of nearly 13,000 patients
1 Jun 2026
High1 Jun 2026
Organisation not named
Healthcare · 900,000 records
The disclosure as indexed does not name the organisation.
Thousands of NHS patient records confirmed stolen in major ransomware attack disrupting healthcare services
1 Jun 2026
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