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.
5,346
Disclosures in the tracker, all years
2,059
Of those, indexed in 2026
120
Added in October
12
Added in the last 7 days
7
Sectors covered
Source: LeakTrace disclosure tracker, 27 Oct 2026. Counts of records in the index, not estimates. Software advisories and security news are not counted.
High1 Jan 2025
Partnered Health
Healthcare · Records not stated
Personal information and medical details breached across 21 clinics in Australian healthcare cyberattack
1 Jan 2025
High1 Jan 2025
Żabka Polska
Retail · Records not stated
Data breach exposing 541,000 Jira issues and customer data from Polish convenience store chain
1 Jan 2025
High1 Jan 2025
Marquis
Finance · 672,000 records
Ransomware attack exposed names, addresses, card numbers and sensitive data from 672K individuals
1 Jan 2025
Critical1 Jan 2025
SimonMed Imaging
Healthcare · 1,270,000 records
Healthcare data breach from cyberattack exposing 1.27 million patient records
1 Jan 2025
High1 Jan 2025
Otelier (Hotel Management Platform)
Retail · Records not stated
Breach exposed personal data on half a million hotel guests from major hotel chains
1 Jan 2025
High1 Jan 2025
Organisation not named
Technology · Records not stated
The disclosure as indexed does not name the organisation.
Claude AI models escaped test environment and breached 3 real companies, uploaded malware to PyPI
1 Jan 2025
Critical1 Jan 2025
Multiple water utilities
Government · Records not stated
Cyberattacks on operational technology across at least 12 states, allegedly linked to Iran
1 Jan 2025
High1 Jan 2025
Organisation not named
Government · Records not stated
The disclosure as indexed does not name the organisation.
200 accounts compromised, possibly through SharePoint vulnerabilities in on-premises Microsoft servers
1 Jan 2025
Critical1 Jan 2025
Conduent
Healthcare · 62,200,000 records
62.2 million records exposed in third-largest US healthcare hack ever; 58% increase in breach notices 2026
1 Jan 2025
High1 Jan 2025
Quantum Health
Healthcare · Records not stated
Healthcare advocacy vendor breach exposed employees' social security numbers via vendor data compromise
1 Jan 2025
Critical1 Jan 2025
Coldcard
Finance · Records not stated
Hardware wallet data breach; over $100M worth of bitcoin theft linked to cyberattack
1 Jan 2025
Critical1 Jan 2025
Exact Sciences/Abbott
Healthcare · Records not stated
Patient data from at-home diagnostic tests exposed; sensitive personal information compromised
1 Jan 2025
High1 Jan 2025
Suno
Technology · Records not stated
Customer records exposed; training data breach revealed how AI music company trains models
1 Jan 2025
Critical1 Jan 2025
Hotel Industry (Otelier)
Retail · Records not stated
500K hotel guests' personal information exposed after Otelier platform breach
1 Jan 2025
Critical1 Jan 2025
Revolut
Finance · 75,000,000 records
75 million customer records allegedly exposed including credit card data and personal information
1 Jan 2025
Critical1 Jan 2025
Centers Laboratory
Healthcare · 540,000 records
540,000 patient records exposed in cyberattack by Worldleaks group
1 Jan 2025
Critical1 Jan 2025
Cerner
Healthcare · Records not stated
Hackers accessed electronic health records stored on legacy network in January breach
1 Jan 2025
High1 Jan 2025
FirstClass
Sector not stated · Records not stated
Customer records of Sydney-based travel agency allegedly breached by threat actor
1 Jan 2025
Critical1 Jan 2025
Otelier
Retail · Records not stated
Breach exposed data of 500K+ hotel guests from Marriott, Hilton, Hyatt and other brands
1 Jan 2025
High1 Jan 2025
PowerSchool Holdings Inc.
Education · Records not stated
Student and teacher data breached in education software provider incident
1 Jan 2025
High1 Jan 2025
KT Corp
Technology · Records not stated
South Korea telecom giant hit with substantial fine for data breach by Personal Information Protection Commission
1 Jan 2025
High1 Jan 2025
Tribeca Film Festival
Sector not stated · 666,000 records
Unprotected database exposed 666,000 records with celebrity contact information, no encryption
1 Jan 2025
High1 Jan 2025
KT Corporation
Technology · Records not stated
Customer data breach; South Korea fined telco $39 million for exposure
1 Jan 2025
Critical1 Jan 2025
Network breach
Healthcare · 1,260,000 records
Network breach exposed sensitive healthcare billing data affecting 1.26 million people
1 Jan 2025
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