Disclosure tracker › Disclosures in 2024
Intelligence · Disclosure tracker
Disclosures in 2024
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.
5,273
Disclosures in the tracker, all years
1,986
Of those, indexed in 2026
29
Added in October
15
Added in the last 7 days
7
Sectors covered
Source: LeakTrace disclosure tracker, 11 Oct 2026. Counts of records in the index, not estimates. Software advisories and security news are not counted.
2,487 results · Disclosures in 2024. Clear filters
Critical27 Feb 2024
27 Feb 2024
Critical25 Feb 2024
City of Hamilton
Government · Records not stated
Ransomware disrupted city services for weeks
25 Feb 2024
High25 Feb 2024
City of Hamilton Ransomware
Government · Records not stated
Ransomware disrupted city services for weeks, phone lines, transit, online services down
25 Feb 2024
High23 Feb 2024
Thyssenkrupp AG
Sector not stated · Records not stated
Cyberattack on automotive body division, employee and production data compromised
23 Feb 2024
High23 Feb 2024
ThyssenKrupp
Sector not stated · Records not stated
Cyberattack disrupted automotive steel division
23 Feb 2024
High22 Feb 2024
Facebook Marketplace
Retail · 77,267 records
77,267 records exposed, Email addresses, Geographic locations, Names, Passwords and 2 more
22 Feb 2024
Critical22 Feb 2024
RCMP
Government · Records not stated
Internal network breach, scope classified
22 Feb 2024
Critical21 Feb 2024
UnitedHealth (operations)
Sector not stated · Records not stated
Change Healthcare attack caused nationwide healthcare billing chaos
21 Feb 2024
Critical21 Feb 2024
Cencora / AmerisourceBergen (tech)
Technology · Records not stated
Pharmaceutical distributor breach affected multiple pharma companies
21 Feb 2024
Critical21 Feb 2024
UnitedHealth Group
Technology · Records not stated
$22B revenue impact from Change Healthcare ransomware
21 Feb 2024
Critical21 Feb 2024
Change Healthcare (tech)
Technology · 100,000,000 records
ALPHV ransomware caused nationwide healthcare billing disruption for months
21 Feb 2024
Critical21 Feb 2024
Cencora / AmerisourceBergen
Healthcare · 1,400,000 records
1.4M patient pharmaceutical records exposed in data exfiltration
21 Feb 2024
Critical21 Feb 2024
Change Healthcare / UnitedHealth
Healthcare · 190,000,000 records
190M patient records stolen in ALPHV ransomware attack
21 Feb 2024
Medium20 Feb 2024
43K student records exposed in data breach
Education · Records not stated
43K student records exposed in data breach
20 Feb 2024
Medium20 Feb 2024
43K student records exposed in data breach
Education · Records not stated
43K student records exposed in data breach
20 Feb 2024
Medium20 Feb 2024
43K student records exposed in data breach
Education · Records not stated
43K student records exposed in data breach
20 Feb 2024
Medium20 Feb 2024
43K student records exposed in data breach
Education · Records not stated
43K student records exposed in data breach
20 Feb 2024
Medium20 Feb 2024
43K student records exposed in data breach
Education · Records not stated
43K student records exposed in data breach
20 Feb 2024
Medium20 Feb 2024
43K student records exposed in data breach
Education · Records not stated
43K student records exposed in data breach
20 Feb 2024
Medium20 Feb 2024
43K student records exposed in data breach
Education · Records not stated
43K student records exposed in data breach
20 Feb 2024
Medium20 Feb 2024
43K student records exposed in data breach
Education · Records not stated
43K student records exposed in data breach
20 Feb 2024
Medium20 Feb 2024
43K student records exposed in data breach
Education · Records not stated
43K student records exposed in data breach
20 Feb 2024
Medium20 Feb 2024
43K student records exposed in data breach
Education · Records not stated
43K student records exposed in data breach
20 Feb 2024
Medium20 Feb 2024
43K student records exposed in data breach
Education · Records not stated
43K student records exposed in data breach
20 Feb 2024
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