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 medical research project exposed online, leaked dozens of times
1 Mar 2026
Critical1 Mar 2026
Trizetto Provider Solutions
Healthcare · 3,400,000 records
Unauthorized IT environment access exposing PHI of 3.4 million individuals
1 Mar 2026
High1 Mar 2026
Foster City (government)
Government · Records not stated
Ransomware attack forced city computer systems offline
1 Mar 2026
High1 Mar 2026
Foster City
Government · Records not stated
Ransomware attack forced city computer systems offline
1 Mar 2026
High1 Mar 2026
Berlin Government
Government · Records not stated
Rhysida ransomware attack with claimed data theft before elections
1 Mar 2026
High1 Mar 2026
Foster City
Government · Records not stated
Ransomware attack on city computer network forcing system offline
1 Mar 2026
Critical1 Mar 2026
CareCloud
Healthcare · Records not stated
Healthcare software firm informed SEC of potential patient data leak after hackers accessed electronic health records systems
1 Mar 2026
Critical1 Mar 2026
Intesa Sanpaolo S.p.A.
Finance · Records not stated
Employee unlawfully accessed customer data over 2+ years; €31.8M regulatory fine
1 Mar 2026
High1 Mar 2026
Companies House
Government · Records not stated
Security issue in WebFiling service exposed company data during five-month period
1 Mar 2026
High1 Mar 2026
Foster City
Government · Records not stated
Ransomware attack forced city computer system offline for days
1 Mar 2026
High1 Mar 2026
Foster City Government
Government · Records not stated
Ransomware attack forced city computer systems offline; declared state of emergency
1 Mar 2026
High1 Mar 2026
Hasbro
Retail · Records not stated
Corporate network breach exposed employee personal and financial data
1 Mar 2026
High1 Mar 2026
Foster City
Government · Records not stated
Ransomware attack on city computer network forced systems offline
1 Mar 2026
High1 Mar 2026
Foster City
Government · Records not stated
Ransomware attack on city computer system forced offline for days, emergency declared
1 Mar 2026
Critical1 Mar 2026
GuardDog Telehealth
Healthcare · Records not stated
Telehealth company illegally accessed patients' medical records under guise of treatment and sold to law firms
1 Mar 2026
Critical1 Mar 2026
Intesa Sanpaolo S.p.A.
Finance · Records not stated
Employee unlawfully accessed customer data over two years, serious data protection failures
1 Mar 2026
Critical1 Mar 2026
CareCloud
Healthcare · Records not stated
Hackers gained access to systems, potential leak of electronic health records
1 Mar 2026
High1 Mar 2026
Puerto Rico CESCO
Government · Records not stated
Driver's license and vehicle registration agency affected by cyberattack
1 Mar 2026
High1 Mar 2026
Companies House
Government · Records not stated
Security issue enabled unauthorized access to WebFiling service data for five months
1 Mar 2026
Critical1 Mar 2026
CISA (US Department)
Government · Records not stated
CISA breached through Cisco vulnerability; FIRESTARTER backdoor malware allowed persistent access through March 2026
1 Mar 2026
High1 Mar 2026
Foster City
Government · Records not stated
City computer system taken offline for days by ransomware attack
1 Mar 2026
Medium1 Mar 2026
Foster City
Government · Records not stated
Ransomware attack forced city computer system offline for multiple days; state of emergency declared
1 Mar 2026
High1 Mar 2026
Companies House
Government · Records not stated
Data exposed during five-month security issue; WebFiling service users' information potentially compromised
1 Mar 2026
Critical1 Mar 2026
Ransomware attack leading to data
Healthcare · Records not stated
Ransomware attack leading to data leak including driver's license numbers and voter IDs
1 Mar 2026
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