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
1,992
Of those, indexed in 2026
41
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.
3,949 results · Disclosures in 2026. Clear filters
High1 Aug 2026
Organisation not named
Government · Records not stated
The disclosure as indexed does not name the organisation.
200 accounts compromised through anomalies detected in on-premises Microsoft servers, SharePoint vulnerabilities suspected
1 Aug 2026
Critical1 Aug 2026
Police National Legal Database
Government · Records not stated
ExfilSquad stole 135,000 contact records and leaked on dark web
1 Aug 2026
Critical1 Aug 2026
Madera Community Hospital
Healthcare · 150,000 records
Extortion group stole personal, financial, and medical information of 150,000 patients
1 Aug 2026
High1 Aug 2026
SK Telecom
Technology · Records not stated
Massive data leak with compensation ordered at $67 per user by Korea's consumer agency
1 Aug 2026
High1 Aug 2026
Yearslong data breach of residents' private health-related information
Government · Records not stated
Yearslong data breach of residents' private health-related information
1 Aug 2026
High1 Aug 2026
Nissan
Sector not stated · Records not stated
SSNs and banking data stolen via Oracle zero-day
1 Aug 2026
High1 Aug 2026
FirstClass
Sector not stated · Records not stated
Australian travel agency customer records allegedly compromised in data breach
1 Aug 2026
Critical1 Aug 2026
Marquis Software Solutions
Finance · Records not stated
Ransomware attack exposes 788,000 financial records and sensitive customer data including names, addresses, card numbers
1 Aug 2026
Critical1 Aug 2026
1 Aug 2026
High1 Aug 2026
Law Firm (unnamed)
Legal · 13,000 records
Breached law firm exposed hospital records for nearly 13,000 patients in New Jersey
1 Aug 2026
Critical1 Aug 2026
Healthcare billing company breach
Healthcare · 1,260,000 records
Healthcare billing company breach exposed sensitive data affecting 1.26 million people
1 Aug 2026
High1 Aug 2026
Synnovis/Mid South Essex NHS
Healthcare · 900,000 records
Major ransomware attack stole thousands of NHS patient records from Essex healthcare trust
1 Aug 2026
High1 Aug 2026
Ericsson
Technology · 15,661 records
Voice phishing attack exposed data of 15,661 people including SSNs and medical records
1 Aug 2026
High1 Aug 2026
EY Global Advisory
Finance · Records not stated
Personal records acquired in unauthorized access
1 Aug 2026
Critical1 Aug 2026
KDDI Telco Group
Technology · 12,000,000 records
12M email credentials exposed across six ISPs
1 Aug 2026
Critical1 Aug 2026
30M patient records stolen including 1M SSNs
Healthcare · 30,000,000 records
30M patient records stolen including 1M SSNs
1 Aug 2026
High1 Aug 2026
Synnovis/Essex NHS
Healthcare · 900,000 records
Ransomware attack stole thousands of patient records held by NHS trust in Essex; disclosed over 6 months after notification
1 Aug 2026
High1 Aug 2026
U.S. Civil Service Agencies
Government · Records not stated
Thousands of civil servants' passwords exposed since early 2024, including White House linked credentials
1 Aug 2026
High1 Aug 2026
Multiple Gaming Platforms
Technology · Records not stated
Over 11 million gaming account credentials exposed in 2024 data leaks
1 Aug 2026
Critical1 Aug 2026
US Homeland Security
Government · Records not stated
HSIN government network breached during World Cup
1 Aug 2026
High1 Aug 2026
Cherry Creek School District
Education · Records not stated
Student data breached; district notified families and facing lawsuit
1 Aug 2026
High1 Aug 2026
Personal information
Retail · Records not stated
Personal information exposed in data security incident; $40M settlement reached
1 Aug 2026
High1 Aug 2026
KT Corporation
Technology · Records not stated
Customer data breach affecting multiple individuals in South Korea telecommunications
1 Aug 2026
Critical1 Aug 2026
1 Aug 2026
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