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.
5,274
Disclosures in the tracker, all years
1,988
Of those, indexed in 2026
36
Added in October
13
Added in the last 7 days
7
Sectors covered
Source: LeakTrace disclosure tracker, 13 Oct 2026. Counts of records in the index, not estimates. Software advisories and security news are not counted.
3,944 results · Disclosures in 2026. Clear filters
High15 Sep 2026
Sax
Legal · 220,000 records
Top US accounting firm disclosed 2024 data breach impacting 220,000 individuals
15 Sep 2026
High15 Sep 2026
Cell C
Technology · Records not stated
Data breach following cyberattack at South African telecom provider
15 Sep 2026
High15 Sep 2026
TransUnion
Finance · 37,000 records
2019 breach exposed credit and personal data of 37,000 people
15 Sep 2026
Critical15 Sep 2026
Optus
Technology · Records not stated
2022 cyber breach with privacy regulator lawsuit filed for privacy law violations
15 Sep 2026
Critical15 Sep 2026
Marquis Software Solutions
Finance · Records not stated
Ransomware attack exposing 788,000 financial records affecting 74+ US banks and credit unions
15 Sep 2026
Critical15 Sep 2026
AT&T
Technology · 109,000,000 records
Data breach exposing over 100 million customers across two separate incidents in 2024
15 Sep 2026
High15 Sep 2026
Thousands of civil servants' passwords
Government · Records not stated
Thousands of civil servants' passwords exposed since early 2024, including White House-linked credentials
15 Sep 2026
Critical15 Sep 2026
MCBS
Healthcare · 1,200,000 records
Data breach affected 1.2 million individuals' medical business information
15 Sep 2026
High15 Sep 2026
Paylogix
Finance · Records not stated
Akira ransomware gang stole health, financial, and identity data from tens of thousands
15 Sep 2026
Critical15 Sep 2026
Medical Billing Company
Healthcare · 1,300,000 records
Ransomware attack exposed 1.3 million individuals' protected health data
15 Sep 2026
Critical15 Sep 2026
Change Healthcare
Healthcare · 100,000,000 records
2024 ransomware attack exposed sensitive healthcare data
15 Sep 2026
Critical15 Sep 2026
Bankinter (EVO Banco)
Finance · 1,270,000 records
1.27M records exposed via API vulnerability including financial and identity data
15 Sep 2026
Critical14 Sep 2026
Japan's Digital Agency
Government · 246,000 records
Japan's Digital Agency has discovered a data breach that may have exposed around 246,000 record rows containing personal information of government employees.
14 Sep 2026
Medium14 Sep 2026
Organisation not named
Technology · Records not stated
The disclosure as indexed does not name the organisation.
A mass-scanning campaign targeting internet-exposed Vite development servers is attempting to steal cloud credentials and configurations from AWS and Azure deployments.
14 Sep 2026
Critical14 Sep 2026
DISA Global Solutions
Sector not stated · 3,300,000 records
Data breach in 2024 impacted more than 3.3 million individuals
14 Sep 2026
Critical14 Sep 2026
T-Mobile
Technology · 64,000,000 records
Over 64 million customer records leaked online by hackers
14 Sep 2026
High14 Sep 2026
DocketWise
Legal · 143,000 records
Data breach affected 143,000 individuals
14 Sep 2026
Critical14 Sep 2026
Columbia University
Education · 860,000 records
Data breach impacted 860,000 individuals with personal information exposed
14 Sep 2026
High14 Sep 2026
Pierce County Library
Education · 340,000 records
Data breach exposed personal information of 340,000 individuals
14 Sep 2026
High14 Sep 2026
Centers Laboratory
Healthcare · 540,000 records
Data breach affects 540,000 individuals
14 Sep 2026
Critical14 Sep 2026
Unlimited Technology Systems
Technology · 3,800,000 records
Data breach impacts 3.8 million individuals
14 Sep 2026
High14 Sep 2026
MCBS
Healthcare · 1,200,000 records
Data breach affects 1.2 million individuals
14 Sep 2026
High14 Sep 2026
Covenant Health
Healthcare · 480,000 records
Qilin ransomware attack impacted nearly 480,000 individuals
14 Sep 2026
High14 Sep 2026
ADT
Sector not stated · 30,814 records
Customer data stolen in cyber intrusion
14 Sep 2026
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