Privacy Unpacked

Weekly breach brief

Data breaches in the week of 23–29 March 2026

61 data breaches on the tracker, 61 confirmed by the organisation or a regulator.

Breaches
61
Notices in CA and WA
18
Ransomware claims
134
Largest
339,778

The largest

  1. BreachForums Version 5 339,778 accounts
  2. Sound Radix 292,993 accounts
  3. RuneScape Boards 222,762 accounts
  4. Quatrro Business Support Services Inc 188,218 people United States
  5. Hightower Holding, LLC 131,483 people United States
  6. Scuf Gaming 128,683 accounts

Every breach this week, by country

United States 57

Country being checked 4

Ransomware claims

Gangs named 134 organisations on their leak sites this week, against 168 the week before. A claim is the gang’s word, not a confirmed breach.

Every week

Follow the brief: one entry a week (Atom). The 2026 report has the year so far.

From the data breach tracker: official notices, breach databases and the news, every fact with its source. Open data (CC BY 4.0) · How the tracker works · Official registers · Corrections and changes · Found a mistake? Tell us and we correct it.