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
High14 Sep 2026
Organisation not named
Healthcare · Records not stated
The disclosure as indexed does not name the organisation.
Ransomware attack resulted in data leak of patient information
14 Sep 2026
Critical14 Sep 2026
700Credit
Finance · 5,800,000 records
Data breach impacts 5.8 million individuals with credit information
14 Sep 2026
Critical14 Sep 2026
Prosper
Finance · 20,000,000 records
Data breach impacting approximately 20 million people
14 Sep 2026
High14 Sep 2026
Kaplan
Education · Records not stated
Education company reports data breach impacting customers
14 Sep 2026
Critical14 Sep 2026
Cyberattack compromised personal data of 4.62 million users
Sector not stated · 4,620,000 records
Cyberattack compromised personal data of 4.62 million users
14 Sep 2026
High14 Sep 2026
FinWise Bank
Finance · 689,000 records
Insider data breach impacting 689,000 customers
14 Sep 2026
High14 Sep 2026
Cell C
Technology · Records not stated
Data breach following cyberattack affecting South African telecom provider
14 Sep 2026
High14 Sep 2026
Organisation not named
Healthcare · Records not stated
The disclosure as indexed does not name the organisation.
Ransomware attack affecting government-run network of healthcare testing laboratories
14 Sep 2026
High14 Sep 2026
Mizuno
Retail · Records not stated
Ransomware attack exposed customer data in 2024
14 Sep 2026
Critical14 Sep 2026
Marquis Software Solutions
Finance · Records not stated
Ransomware attack in 2025 exposing 672,000-788,000 financial records including names, addresses, card numbers
14 Sep 2026
High14 Sep 2026
Bedfordshire Hospital
Healthcare · Records not stated
Patient names, NHS numbers, and test results compromised in cyber attack
14 Sep 2026
Critical14 Sep 2026
UnitedHealthcare
Healthcare · Records not stated
2024 cyberattack exposed sensitive data from millions of patients including health and insurance information
14 Sep 2026
High14 Sep 2026
Paylogix
Finance · Records not stated
Akira ransomware gang stole health, financial and identity data from tens of thousands of plan participants
14 Sep 2026
Critical14 Sep 2026
Medical billing company (unnamed)
Healthcare · 1,300,000 records
2025 ransomware attack exposed sensitive protected health data on 1.3M people, leaked to dark web
14 Sep 2026
High14 Sep 2026
Highland Oncology Group
Healthcare · Records not stated
2025 ransomware attack on Arkansas-based cancer care practice resulted in settlement litigation
14 Sep 2026
Critical14 Sep 2026
AT&T
Technology · 109,000,000 records
Two separate incidents in 2024 exposed data from 100M+ customers
14 Sep 2026
Critical14 Sep 2026
Bankinter/EVO Banco
Finance · 1,270,000 records
API vulnerability exposed financial and identity data of 1.27M records in Spain
14 Sep 2026
Critical14 Sep 2026
Revolut
Finance · Records not stated
Fintech company Revolut has disclosed a data breach after sharing data from an undisclosed number of customers with a threat actor impersonating a government agency.
14 Sep 2026
High13 Sep 2026
Chess.com (2026)
Technology · 4,653,212 records
4,653,212 records exposed, Email addresses, Geographic locations, Names, Usernames
13 Sep 2026
Medium12 Sep 2026
Not just Korea
Sector not stated · Records not stated
Shin Da-eun and Park Kang-su report: Korea was not the only country where victims who sent Google removal requests about illegally obtained sexual images ended up having their private information posted online, the…
12 Sep 2026
Medium11 Sep 2026
Florida
Government · Records not stated
The Florida Department of Motor Vehicles confirmed a data breach claimed by the cybercrime group ShinyHunters, saying it originated with the theft of credentials stored on a police officer's personal device.
11 Sep 2026
Medium11 Sep 2026
Florida
Government · Records not stated
The Florida Department of Highway Safety and Motor Vehicles (FLHSMV) has confirmed that its DAVID driver database suffered a data breach, saying the attackers gained access using credentials belonging to a police…
11 Sep 2026
Medium10 Sep 2026
ThreatsDay
Sector not stated · Records not stated
A lot of this week’s security news has the same awkward answer to one question: “Why was that allowed to work?”
An extension asks for access and takes too much. A trusted service becomes part of a phishing chain. An…
10 Sep 2026
Critical10 Sep 2026
IDScan
Sector not stated · Records not stated
A notice dated September 4 but not widely shared shows that IDScan acknowledged a data breach but did not specify how many people were affected.
10 Sep 2026
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