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.
5,296
Disclosures in the tracker, all years
2,010
Of those, indexed in 2026
58
Added in October
15
Added in the last 7 days
7
Sectors covered
Source: LeakTrace disclosure tracker, 18 Oct 2026. Counts of records in the index, not estimates. Software advisories and security news are not counted.
3,981 results · Disclosures in 2026. Clear filters
Critical1 Apr 2026
Marquis (fintech)
Finance · 672,000 records
2025 ransomware attack stole 672,000 records including names, addresses and card numbers
1 Apr 2026
High1 Apr 2026
U.S. Federal Agency (CISA)
Government · Records not stated
Unnamed U.S. department breached through Cisco vulnerability; FIRESTARTER backdoor allowed persistent access through March 2026
1 Apr 2026
Critical1 Apr 2026
Fortinet FortiGate
Technology · Records not stated
73,932 FortiGate firewall systems exposed with valid administrative and VPN credentials
1 Apr 2026
High1 Apr 2026
River Financial Corporation
Finance · Records not stated
Ransomware attack with data stolen; hackers confirmed data deletion
1 Apr 2026
High1 Apr 2026
Żabka Polska
Retail · Records not stated
Data breach exposing 541,000 Jira issues and customer data from major Polish retailer
1 Apr 2026
High1 Apr 2026
T-Mobile USA
Technology · Records not stated
Insider incident data breach with limited impact
1 Apr 2026
High1 Apr 2026
Ernst & Young (EY)
Legal · Records not stated
Third-party IT service breach exposed client tax data (March 28 - April 12, 2026)
1 Apr 2026
High1 Apr 2026
Fidelity Brokerage Services
Finance · Records not stated
Data breach resulting in $1.25M regulatory fine
1 Apr 2026
Critical1 Apr 2026
Paidwork
Technology · 22,000,000 records
22 million user records exposed including emails, passwords, and banking data
1 Apr 2026
Critical1 Apr 2026
Organisation not named
Technology · 165,000,000 records
The disclosure as indexed does not name the organisation.
165 organizations breached via Snowflake platform by ShinyHunters through compromised Anodot access
1 Apr 2026
High1 Apr 2026
Ernst & Young
Legal · Records not stated
Third-party IT service management platform breached; client tax data exposed March 28 - April 12, 2026
1 Apr 2026
Medium1 Apr 2026
T-Mobile
Technology · Records not stated
Insider data breach incident with limited impact
1 Apr 2026
High1 Apr 2026
Heart South Cardiovascular Group
Healthcare · 46,666 records
Data breach affected 46,666 patients, exposing personal and health records
1 Apr 2026
High1 Apr 2026
CISA (US Government)
Government · Records not stated
US agency breached through Cisco vulnerability; FIRESTARTER backdoor allowed access through March
1 Apr 2026
Critical1 Apr 2026
Marquis Software Solutions
Finance · Records not stated
Ransomware attack exposed 788,000 financial records including names, addresses and card numbers
1 Apr 2026
High1 Apr 2026
CISA/US Government Agency
Government · Records not stated
Unnamed U.S. department breached through Cisco vulnerability; FIRESTARTER backdoor provided persistent access through March 2026
1 Apr 2026
Critical1 Apr 2026
CISA (US Agency)
Government · Records not stated
Unnamed US department breached via Cisco vulnerability, FIRESTARTER backdoor allowed persistent access
1 Apr 2026
High1 Apr 2026
Sandhills Medical Foundation
Healthcare · 170,000 records
Ransomware breach affecting 170,000 individuals in South Carolina
1 Apr 2026
High1 Apr 2026
Tribeca Film Festival
Sector not stated · 666,000 records
666,000 records including celebrity contact data exposed from unprotected database without password or encryption
1 Apr 2026
Critical1 Apr 2026
ANTS (France)
Government · 19,000,000 records
Cyberattack on French identity agency exposed 19 million records with personal data
1 Apr 2026
High1 Apr 2026
Cherry Creek School District
Education · Records not stated
Student data breach resulted in lawsuit against school district
1 Apr 2026
Critical1 Apr 2026
US Government Agency (CISA)
Government · Records not stated
Unnamed US agency breached through Cisco vulnerability; FIRESTARTER backdoor allowed access through March 2026
1 Apr 2026
Critical1 Apr 2026
Unnamed U.S. Department (CISA)
Government · Records not stated
Breached through Cisco vulnerability; FIRESTARTER backdoor allowed unauthorized access through March
1 Apr 2026
High1 Apr 2026
Huntsville Hospital Health System
Healthcare · Records not stated
Third-party data breach compromised patient information
1 Apr 2026
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