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.
5,377
Disclosures in the tracker, all years
2,093
Of those, indexed in 2026
13
Added in November
27
Added in the last 7 days
7
Sectors covered
Source: LeakTrace disclosure tracker, 3 Nov 2026. Counts of records in the index, not estimates. Software advisories and security news are not counted.
High10 Jun 2024
City of Cleveland OH
Government · Records not stated
Ransomware shut down city hall operations
10 Jun 2024
High8 Jun 2024
Kadokawa / Niconico (Japan)
Technology · 250,000 records
BlackSuit ransomware disrupted Niconico video platform for 2 months, 250,000 records
8 Jun 2024
Medium6 Jun 2024
6 Jun 2024
Critical6 Jun 2024
6 Jun 2024
Critical6 Jun 2024
6 Jun 2024
High5 Jun 2024
MedStar Health (2024)
Healthcare · 183,000 records
183K patient records exposed in second incident
5 Jun 2024
Critical3 Jun 2024
Combolists Posted to Telegram
Technology · 361,468,099 records
361,468,099 records exposed, Email addresses, Passwords, Usernames
3 Jun 2024
Critical3 Jun 2024
Synnovis NHS Pathology
Healthcare · 900,000 records
Qilin ransomware disrupted blood testing for London hospitals, 3,166 appointments cancelled
3 Jun 2024
High1 Jun 2024
Kadokawa Corporation/Niconico
Technology · Records not stated
Sophisticated cyberattack and ransomware breach exposing company systems
1 Jun 2024
High1 Jun 2024
Bedfordshire Hospital
Healthcare · Records not stated
Patient names, NHS numbers and test results hacked in 2024 cyber attack
1 Jun 2024
High1 Jun 2024
Bedfordshire Hospital
Healthcare · Records not stated
Patient data including names, NHS numbers and test results compromised in cyber attack.
1 Jun 2024
Critical1 Jun 2024
Multiple Snowflake Customers (165+)
Technology · 165,000,000 records
Hacker Connor Moucka stole data from 165+ companies including billions of records via compromised credentials
1 Jun 2024
High1 Jun 2024
SingTel (Singapore Telecommunications)
Technology · Records not stated
Breached by China state-linked hacking group in June as part of global campaign
1 Jun 2024
High1 Jun 2024
Kadokawa Corporation / Niconico
Technology · Records not stated
Sophisticated ransomware cyberattack exposed data from corporation and subsidiary
1 Jun 2024
Critical1 Jun 2024
Snowflake (165+ customers)
Technology · 165,000,000 records
Identity-based attacks exploited Snowflake customer accounts; hacker stole billions of records from 165+ companies including Ticketmaster, Rockstar Games
1 Jun 2024
Critical1 Jun 2024
Singapore Telecommunications (SingTel)
Technology · Records not stated
China state-linked hacking group breached telecom company in June as part of global campaign
1 Jun 2024
High1 Jun 2024
Kadokawa Corporation / Niconico
Technology · Records not stated
Ransomware cyberattack exposed personal information of employees and users
1 Jun 2024
Critical1 Jun 2024
Snowflake (165 customer organizations)
Technology · 165,000,000 records
Hacker stole data from 165+ Snowflake customers, billions of records compromised through identity-based attacks
1 Jun 2024
High1 Jun 2024
Kadokawa Corp.
Technology · Records not stated
Personal information of all employees of niconico video subsidiary exposed in cyberattack
1 Jun 2024
Critical1 Jun 2024
Bedfordshire Hospital
Healthcare · Records not stated
Patient names, NHS numbers, and test results exposed in cyber attack
1 Jun 2024
Critical1 Jun 2024
Organisation not named
Technology · 165,000,000 records
The disclosure as indexed does not name the organisation.
Identity-based attacks exploited Snowflake customer accounts; billions of records stolen across 165+ organizations
1 Jun 2024
High1 Jun 2024
Kadokawa Corporation/Niconico
Technology · Records not stated
Ransomware cyberattack exposed personal information of all subsidiary employees
1 Jun 2024
Critical1 Jun 2024
Organisation not named
Technology · Records not stated
The disclosure as indexed does not name the organisation.
Hacker breached 165+ companies stealing billions of records; Canadian hacker Connor Moucka pleaded guilty
1 Jun 2024
High1 Jun 2024
Singapore Telecommunications (SingTel)
Technology · Records not stated
Breached by China state-sponsored hacking group in June 2024 as part of global campaign
1 Jun 2024
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