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.
5,438
Disclosures in the tracker, all years
2,152
Of those, indexed in 2026
89
Added in November
23
Added in the last 7 days
7
Sectors covered
Source: LeakTrace disclosure tracker, 12 Nov 2026. Counts of records in the index, not estimates. Software advisories and security news are not counted.
Worldwide · How they got in
Incidents worldwide, by country.
79 incidents from 9 countries in the last 90 days, each from a public source and reviewed before it is shown. Where the source says how the attackers got in, the row says so.
- Australia4 Nov 2026Bristol City Council (Trading with Schools platform)The source does not say how they got in.Yahoo News Australia (citing BBC)
Critical9 May 2024
Dell Technologies
Technology · 49,000,000 records
49M customer order records exposed in API scraping
9 May 2024
High9 May 2024
9 May 2024
Critical8 May 2024
Ascension Health Systems
Sector not stated · Records not stated
$1.8B impact from Black Basta ransomware on hospital chain
8 May 2024
Critical8 May 2024
Ascension (tech)
Technology · Records not stated
Black Basta ransomware disrupted clinical operations at 140 hospitals
8 May 2024
Critical8 May 2024
Ascension Health
Healthcare · 5,600,000 records
5.6M patient records compromised in Black Basta ransomware across 140 hospitals
8 May 2024
Medium7 May 2024
7 May 2024
High5 May 2024
5 May 2024
High5 May 2024
City of Wichita KS
Government · Records not stated
LockBit ransomware attack disabled city services
5 May 2024
Medium2 May 2024
2 May 2024
Critical1 May 2024
Dell
Technology · 49,000,000 records
Brute-force attack on partner portal exposed 49 million customer records
1 May 2024
High1 May 2024
European Parliament
Government · Records not stated
Massive data breach in recruiting platform affecting staff data in May 2024
1 May 2024
Critical1 May 2024
Snowflake customers (165+ organizations)
Technology · 165,000,000 records
Identity-based attacks on Snowflake customers including Rockstar Games, AT&T, Advanced Auto Parts, LendingTree; billions of records stolen
1 May 2024
High1 May 2024
Ohio Lottery
Government · 500,000 records
Cybersecurity incident revealing sensitive information of over 500,000 people
1 May 2024
Critical1 May 2024
Ohio Lottery
Government · 500,000 records
Cybersecurity incident exposed sensitive information of over 500K people
1 May 2024
Critical1 May 2024
Identity-based attacks
Technology · Records not stated
Identity-based attacks exposed customer data across 165 organizations; extortion campaign netted $2.7M
1 May 2024
Critical1 May 2024
Rockstar Games
Technology · Records not stated
Data breached through Anodot's Snowflake access as part of 165-organization attack
1 May 2024
High1 May 2024
Taft Stettinius
Legal · Records not stated
Law firm reported data breach among 21 law firms breached in 2024
1 May 2024
High1 May 2024
First Nations Health Authority
Healthcare · Records not stated
Attack by INC ransomware group detected and interrupted
1 May 2024
Critical1 May 2024
Organisation not named
Technology · 109,000,000 records
The disclosure as indexed does not name the organisation.
165+ customer organizations breached via identity-based attacks; $2.7M extorted; AT&T disclosed in July 2024
1 May 2024
Critical1 May 2024
DentaQuest
Healthcare · 15,000,000 records
Cybersecurity incident in May 2024 affecting 15 million+ individuals at dental benefits administrator
1 May 2024
Critical1 May 2024
Canvas (Instructure)
Education · 275,000,000 records
ShinyHunters claimed breach exposing data of approximately 275 million users on educational platform
1 May 2024
Critical1 May 2024
LendingTree
Finance · Records not stated
Customer data exposed through Snowflake vulnerability affecting largest data breaches ever
1 May 2024
Critical1 May 2024
Advanced Auto Parts
Retail · Records not stated
Customer data exposed through Snowflake vulnerability affecting largest data breaches ever
1 May 2024
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