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.
3,944 results · Disclosures in 2026. Clear filters
High1 Jan 2026
Thousands of people's personal information
Government · Records not stated
Thousands of people's personal information leaked; agency delayed public notification for months
1 Jan 2026
Critical1 Jan 2026
Puerto Rico Government Agency
Government · Records not stated
1 million social security numbers exposed via cybersecurity loophole in mapping service
1 Jan 2026
High1 Jan 2026
Central Maine Healthcare
Healthcare · 145,381 records
Data breach impacting personal, treatment, and health insurance information of 145,381 patients
1 Jan 2026
High1 Jan 2026
Fried Frank
Legal · Records not stated
Law firm data security incident affecting high-profile clients
1 Jan 2026
Critical1 Jan 2026
French Telecoms
Finance · Records not stated
October 2024 breach compromising personal data of 24+ million individuals, €42 million GDPR fine
1 Jan 2026
High1 Jan 2026
Organisation not named
Healthcare · Records not stated
The disclosure as indexed does not name the organisation.
Yearslong data breach of residents' private health-related information exposed
1 Jan 2026
Critical1 Jan 2026
LiteLLM
Technology · Records not stated
Supply chain attack compromising over 2,500 organizations through distribution of information-stealing malware
1 Jan 2026
High1 Jan 2026
Organisation not named
Healthcare · Records not stated
The disclosure as indexed does not name the organisation.
Years-long data breach of residents' private health-related information affecting state health program beneficiaries
1 Jan 2026
Critical1 Jan 2026
Organisation not named
Healthcare · Records not stated
The disclosure as indexed does not name the organisation.
High-profile data breach; Montana court cleared path for regulatory enforcement action
1 Jan 2026
High1 Jan 2026
Organisation not named
Healthcare · Records not stated
The disclosure as indexed does not name the organisation.
Yearslong data breach of residents' private health-related information discovered
1 Jan 2026
High1 Jan 2026
Organisation not named
Healthcare · Records not stated
The disclosure as indexed does not name the organisation.
Patient data compromised in third-party vendor breach from 2025 Cerner incident
1 Jan 2026
High1 Jan 2026
HCL Technologies
Technology · Records not stated
Hacker group claimed access to employee data; company stated data may be years-old
1 Jan 2026
High1 Jan 2026
Huntsville Hospital
Healthcare · Records not stated
Patient health information compromised through third-party vendor breach
1 Jan 2026
Critical1 Jan 2026
Instructure
Education · Records not stated
Supply chain breach of Canvas platform generated 58% of all breach notices in 2026
1 Jan 2026
Critical1 Jan 2026
Amgen
Healthcare · Records not stated
Hackers accessed cloud environment, stealing patient health data and intellectual property
1 Jan 2026
High1 Jan 2026
Allstate
Finance · Records not stated
Data breach exposed employee-related records in insurance company cyber incident
1 Jan 2026
High1 Jan 2026
Yearslong breach
Healthcare · Records not stated
Yearslong breach exposed residents' private health-related information
1 Jan 2026
High1 Jan 2026
Stack Sports
Technology · Records not stated
Data breach exposed payment details and bank account numbers of users; financial account information compromised
1 Jan 2026
Critical1 Jan 2026
Fortinet FortiGate
Technology · Records not stated
FortiBleed campaign exposed administrative and VPN credentials for 73,932 FortiGate firewalls
1 Jan 2026
High1 Jan 2026
Valve
Technology · Records not stated
Steam hardware customer data stolen via European logistics partner breach
1 Jan 2026
High1 Jan 2026
Organisation not named
Healthcare · Records not stated
The disclosure as indexed does not name the organisation.
Years-long data breach of residents' private health-related information exposed
1 Jan 2026
Critical1 Jan 2026
MCBS
Healthcare · 1,260,000 records
1.26 million patients exposed in PEAR ransomware attack on medical billing system
1 Jan 2026
Critical1 Jan 2026
Organisation not named
Government · Records not stated
The disclosure as indexed does not name the organisation.
Classified networks compromised with China-linked malware via USB drives, undetected for nearly a year
1 Jan 2026
Critical1 Jan 2026
Organisation not named
Government · Records not stated
The disclosure as indexed does not name the organisation.
Inadvertent exposure of personal information for 700,000 state residents
1 Jan 2026
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