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.
5,276
Disclosures in the tracker, all years
1,989
Of those, indexed in 2026
34
Added in October
11
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.
3,942 results · Disclosures in 2026. Clear filters
Medium12 Oct 2026
Sharecare
Healthcare · 318,185 records
318,185 records exposed, Dates of birth, Email addresses, Employers, Genders and 6 more
12 Oct 2026
Critical11 Oct 2026
Nippon Columbia malware incident
Sector not stated · 8,700,000 records
Daiichi Kosho, a major Japanese entertainment system maker, disclosed that a malware infection at its contractor, Nippon Columbia, exposed more than 8.7 million customer and employee records.
11 Oct 2026
High9 Oct 2026
Hundreds of thousands
Sector not stated · Records not stated
A company known for wearable cardiac sensors, iRhythm, has begun notifying states of the impact of a data breach from the summer.
9 Oct 2026
Medium9 Oct 2026
Neogen
Retail · 435,963 records
435,963 records exposed, Email addresses, Employers, Job titles, Names and 3 more
9 Oct 2026
Critical8 Oct 2026
ThreatsDay
Technology · Records not stated
The crooks have trust problems of their own. One ransomware affiliate decided to keep the profits for himself. Elsewhere, an attacker left a server exposed, complete with tools and traces of an intrusion. Apparently…
8 Oct 2026
Medium7 Oct 2026
CyrusOne
Retail · 373,460 records
373,460 records exposed, Email addresses, Employers, Job titles, Names and 3 more
7 Oct 2026
Medium7 Oct 2026
PoeLLM malware infects
Sector not stated · Records not stated
A cryptomining campaign targeting exposed AI services is using PoeLLM malware to turn compromised servers into scanners and exploit launchpads.
7 Oct 2026
Critical7 Oct 2026
Advantest
Sector not stated · Records not stated
Advantest Corporation is notifying affected individuals that a ransomware attack earlier this year exposed their personally identifiable data.
7 Oct 2026
Medium7 Oct 2026
Organisation not named
Technology · Records not stated
The disclosure as indexed does not name the organisation.
Hackers compromised a third-party communication platform and sent rogue notifications to ASOS users.
The post ASOS Confirms Cyberattack, Data Breach appeared first on SecurityWeek.
7 Oct 2026
Medium7 Oct 2026
Double Counter
Finance · 274,922 records
274,922 records exposed, Email addresses, Geographic locations, Names, Usernames
7 Oct 2026
Critical7 Oct 2026
Angel One
Finance · 6,765,054 records
6,765,054 records exposed, Bank account numbers, Dates of birth, Email addresses, Financial investments and 4 more
7 Oct 2026
Medium6 Oct 2026
ASOS
Technology · Records not stated
UK fashion retailer ASOS confirmed a data breach Tuesday after hackers sent unauthorized push notifications through its mobile app while claiming to have stolen customer data from the company's Snowflake environment.
6 Oct 2026
Medium5 Oct 2026
Ukraine grocery chain ATB
Retail · Records not stated
Ukraine’s largest grocery store chain, ATB, confirmed that it was hit by a cyberattack after hackers posted an extortion demand on its website.
5 Oct 2026
Medium5 Oct 2026
Japanese media group Nikkei
Sector not stated · Records not stated
The Japanese media giant Nikkei disclosed a cyber incident involving an employee email account that may have compromised journalistic sources.
5 Oct 2026
Medium5 Oct 2026
Daiwa Securities
Sector not stated · 110,000 records
Takashi Nakamichi and Ryo Horiuchi report that Daiwa Securities, Japan’s second-largest brokerage and investment banking firm, is responding to a breach at one of its vendors. Daiwa Securities Group said…
5 Oct 2026
Medium5 Oct 2026
Organisation not named
Government · Records not stated
The disclosure as indexed does not name the organisation.
Known as Rey, the suspect is reportedly helping the FBI identify and locate other members of the extortion group.
The post Alleged ShinyHunters Leader Arrested in Jordan appeared first on SecurityWeek.
5 Oct 2026
Medium3 Oct 2026
Danish university DTU breach
Education · 200,000 records
The Technical University of Denmark (DTU) says information belonging to up to 200,000 users may have been exposed after hackers accessed its identity and access management system and downloaded a large amount of data. [.
3 Oct 2026
Medium2 Oct 2026
Frontline Education breach
Education · Records not stated
Frontline Education is notifying school districts of a data breach after attackers exploited a vulnerability in third-party software to gain unauthorized access to its systems and steal employee information, including…
2 Oct 2026
Critical1 Oct 2026
Danish Government
Government · Records not stated
8 million citizens' records stolen from central database
1 Oct 2026
Medium1 Oct 2026
University of Illinois Chicago
Education · Records not stated
Ransomware attack on College of Medicine resulted in theft of some information
1 Oct 2026
High1 Oct 2026
FBI contractor (third-party platform)
Government · Records not stated
Security failure on third-party platform due to unapplied security patch led to data breach affecting thousands of employees
1 Oct 2026
High1 Oct 2026
ASOS
Retail · Records not stated
Hackers compromised third-party communication platform; breach exposed more personal details than initially reported including contact information
1 Oct 2026
Medium1 Oct 2026
Publica
Finance · Records not stated
Data leak after cyberattack hit external software supplier to Swiss pension fund
1 Oct 2026
High1 Oct 2026
Morgan Services
Sector not stated · Records not stated
Social Security numbers and names exposed in data breach
1 Oct 2026
Were you affected?