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.
5,299
Disclosures in the tracker, all years
2,012
Of those, indexed in 2026
58
Added in October
15
Added in the last 7 days
7
Sectors covered
Source: LeakTrace disclosure tracker, 18 Oct 2026. Counts of records in the index, not estimates. Software advisories and security news are not counted.
3,981 results · Disclosures in 2026. Clear filters
Critical1 Apr 2026
Intesa Sanpaolo S.p.A.
Finance · Records not stated
Employee unlawfully accessed customer data over two years, €31.8M fine for breach transparency
1 Apr 2026
Critical1 Apr 2026
US Government Agency (CISA)
Government · Records not stated
Breached through Cisco vulnerability; FIRESTARTER backdoor allowed access through March
1 Apr 2026
High1 Apr 2026
Nissan
Technology · Records not stated
Hacking group breached file-transfer system used by third-party vendor serving Nissan and Infiniti
1 Apr 2026
High1 Apr 2026
Legend Senior Care
Healthcare · Records not stated
Senior care provider affected by ransomware attack disclosing data security incident
1 Apr 2026
High1 Apr 2026
Windward Life Care
Healthcare · Records not stated
Senior care provider affected by ransomware attack disclosing data security incident
1 Apr 2026
High1 Apr 2026
Heart South Cardiovascular Group
Healthcare · 46,666 records
Data breach affected 46,666 patients exposing personal and health records
1 Apr 2026
Critical1 Apr 2026
ANTS (France)
Government · 19,000,000 records
Cyberattack on France's identity agency exposed 19 million records with personal data
1 Apr 2026
Critical1 Apr 2026
Intesa Sanpaolo
Finance · Records not stated
Insider threat breach with employee unlawfully accessing customer data for over two years
1 Apr 2026
High1 Apr 2026
Nissan
Retail · Records not stated
Hacking group breached file-transfer system used by third-party vendor
1 Apr 2026
High1 Apr 2026
Heart South Cardiovascular Group
Healthcare · 46,666 records
46,666 patients affected with personal and health records exposed
1 Apr 2026
Critical1 Apr 2026
ANTS (France)
Government · 19,000,000 records
19M records from national identity agency exposed in cyberattack
1 Apr 2026
Critical1 Apr 2026
Medtronic
Healthcare · 9,000,000 records
Data hack exposed over 9 million client records according to customer class action filing
1 Apr 2026
High1 Apr 2026
Ryanair
Sector not stated · Records not stated
Court documents, flight data, and banking details exposed; data claimed on hacker forum
1 Apr 2026
Critical1 Apr 2026
U.S. Department (CISA)
Government · Records not stated
Unnamed federal agency breached via Cisco vulnerability; FIRESTARTER backdoor allowed access through March
1 Apr 2026
Critical1 Apr 2026
ANTS (French ID Agency)
Government · 19,000,000 records
Major cyberattack exposed 19 million records including personal data linked to French identity system
1 Apr 2026
Critical1 Apr 2026
Intesa Sanpaolo SpA
Finance · Records not stated
Employee unlawfully accessed customer data over two years; Italian regulator fined $36 million for data protection failures
1 Apr 2026
High1 Apr 2026
Nissan
Technology · Records not stated
Hacking group breached file-transfer system of third-party vendor used by Nissan and Infiniti
1 Apr 2026
Critical1 Apr 2026
UK Biobank
Healthcare · Records not stated
Health records of 500,000 Britons offered for sale on Chinese website (Alibaba)
1 Apr 2026
Critical1 Apr 2026
UK Biobank
Healthcare · Records not stated
Private health records of 500,000+ Britons offered for sale on Chinese website
1 Apr 2026
High1 Apr 2026
Cognizant
Technology · Records not stated
Data breach on April 21, 2026 exposing personal information of customers
1 Apr 2026
High1 Apr 2026
Cognizant
Technology · Records not stated
Data breach occurring April 21, 2026 affecting customers with personal information exposed
1 Apr 2026
High1 Apr 2026
Cognizant
Technology · Records not stated
Data breach on April 21, 2026; personal information exposed; company offers $1 million identity theft cover
1 Apr 2026
Critical1 Apr 2026
Intesa Sanpaolo S.p.A.
Finance · Records not stated
Employee unlawfully accessed customer data over two years; insider threat breach
1 Apr 2026
High1 Apr 2026
Nissan
Sector not stated · Records not stated
Data breach involving information held by third-party vendor; hacking group claimed breach
1 Apr 2026
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