Intelligence · Disclosure tracker
Every public disclosure, dated and sourced.
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.
5,292
Disclosures in the tracker, all years
2,005
Of those, indexed in 2026
49
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.
Medium2 Oct 2026
Frontline Education breach
Education · Records not stated
Frontline Education is notifying school districts of a data breach after attackers exploited a vulnerability in third-party software to gain unauthorized access to its systems and steal employee information, including…
2 Oct 2026
High1 Oct 2026
Zizzl LLC
Sector not stated · Records not stated
Data breach exposed Social Security Numbers of 519 people
1 Oct 2026
Critical1 Oct 2026
Napoleon Perdis
Retail · Records not stated
339,055 customer records exposed via vendor Retail Express
1 Oct 2026
High1 Oct 2026
Meta
Technology · Records not stated
Hackers stole source code and personal data of 1,500 employees via GitHub repositories using stolen credentials
1 Oct 2026
Critical1 Oct 2026
Educational Testing Service (ETS)
Education · Records not stated
Over 5.7 million California student records breached, including records dating back to 2006
1 Oct 2026
High1 Oct 2026
University of Illinois Chicago
Education · Records not stated
Ransomware attack on College of Medicine resulted in theft of personal information
1 Oct 2026
High1 Oct 2026
ASOS
Retail · Records not stated
Retailer data breach exposed more personal details than initially disclosed; BBC contacted by hackers
1 Oct 2026
Critical1 Oct 2026
BCHP and XTIUM
Healthcare · Records not stated
Medical data breach exposed SSNs of 62,871 CT and 825,000 NY residents; $2.7M settlement
1 Oct 2026
High1 Oct 2026
Georgia Power and Alabama Power
Sector not stated · Records not stated
Data breach exposed approximately 400,000 customer utility accounts
1 Oct 2026
Critical1 Oct 2026
Danish Government
Government · Records not stated
8 million citizens' records stolen from central database
1 Oct 2026
Medium1 Oct 2026
University of Illinois Chicago
Education · Records not stated
Ransomware attack on College of Medicine resulted in theft of some information
1 Oct 2026
High1 Oct 2026
FBI contractor (third-party platform)
Government · Records not stated
Security failure on third-party platform due to unapplied security patch led to data breach affecting thousands of employees
1 Oct 2026
High1 Oct 2026
ASOS
Retail · Records not stated
Hackers compromised third-party communication platform; breach exposed more personal details than initially reported including contact information
1 Oct 2026
Medium1 Oct 2026
Publica
Finance · Records not stated
Data leak after cyberattack hit external software supplier to Swiss pension fund
1 Oct 2026
High1 Oct 2026
Morgan Services
Sector not stated · Records not stated
Social Security numbers and names exposed in data breach
1 Oct 2026
High1 Oct 2026
Advantest
Technology · Records not stated
SSNs and passport data stolen in ransomware attack; disclosed 233 days after detection
1 Oct 2026
Critical1 Oct 2026
Oracle Health (Cerner)
Healthcare · 20,000,000 records
Nearly 20 million patient records exposed across 80 U.S. hospitals
1 Oct 2026
High1 Oct 2026
Canadian Mennonite University (CMU)
Education · Records not stated
Sensitive personal information including SINs and tax records stolen from thousands of current and former students and employees
1 Oct 2026
High1 Oct 2026
Daiwa Securities
Finance · 220,000 records
220,000 records including 110,000 with personal data exposed via unauthorized access to vendor server
1 Oct 2026
Critical1 Oct 2026
Lawson
Retail · 2,155,345 records
2,155,345 records of personal information leaked due to unauthorized access to Lawson IDs
1 Oct 2026
High1 Oct 2026
University of Illinois Chicago
Education · Records not stated
Ransomware attack on College of Medicine resulted in theft of medical information
1 Oct 2026
High1 Oct 2026
Holland & Knight
Legal · Records not stated
Unauthorized access to law firm systems affecting firm and 14 clients; data security incident disclosed
1 Oct 2026
High1 Oct 2026
ASOS
Retail · Records not stated
Third-party communication platform compromised; hackers accessed customer personal data beyond basic contact details
1 Oct 2026
Medium1 Oct 2026
Organisation not named
Technology · Records not stated
The disclosure as indexed does not name the organisation.
One of Poland’s major online invoicing platforms suffered a data breach that may have exposed information belonging to its users, their customers and business partners.
1 Oct 2026
Were you affected?