Home / Monthly reports / April 2026
Outages & Breaches: April 2026 in numbers
3 significant outages (0 critical) and 7 data breaches (4 critical) were logged in April 2026. The largest breach by records was France Titres (ANTS) (19M claimed). The longest outage with a known duration was Microsoft Azure (East US) (11.9 hours). The most common outage cause was software bug (1 of 3). 1 of the incidents mainly affected the UK.
Outages3▲ 1 vs March
Critical outages0wide impact
Downtime tracked13 hacross 2 outages with a known duration
Breaches7same as March
Critical breaches4sensitive data at scale
Records exposed4.8Mconfirmed or company-reported
Further claimed28Mattacker claims, unverified
Outage causes
Named attackers
Most significant incidents
- 29 Apr 2026Amtrak large-scale customer data breachAmtrak · breach · ShinyHunters
- 24 Apr 2026UK Biobank health and genetic data listed for saleUK Biobank · breach · Unknown · 500K records
- 22 Apr 202619 million French ID agency records allegedly stolenFrance Titres (ANTS) · breach · breach3d · 19M claimed
- 8 Apr 2026Hackers take 7.7TB of LAPD files from city attorneyLA City Attorney (LAPD files) · breach · World Leaks
- 30 Apr 2026Movistar Perú exposes 4 million customer recordsMovistar Perú · breach · Dedale · 4M records
- 27 Apr 2026Medtronic corporate IT breachedMedtronic · breach · ShinyHunters · 9M claimed
- 24 Apr 2026Azure East US provisioning stalls for 12 hoursMicrosoft Azure (East US) · outage · Software bug · 11.9 hours
- 20 Apr 2026ChatGPT, Codex and API down for hoursChatGPT (OpenAI) · outage · Unknown
All 3 outages
- 24 Apr 2026Azure East US provisioning stalls for 12 hoursMicrosoft Azure (East US) · outage · Software bug · 11.9 hours
- 20 Apr 2026ChatGPT, Codex and API down for hoursChatGPT (OpenAI) · outage · Unknown
- 2 Apr 2026Microsoft 365 global disruption for just over an hourMicrosoft 365 · outage · Network · 1 hours
All 7 data breaches
- 30 Apr 2026Movistar Perú exposes 4 million customer recordsMovistar Perú · breach · Dedale · 4M records
- 29 Apr 2026Amtrak large-scale customer data breachAmtrak · breach · ShinyHunters
- 27 Apr 2026Medtronic corporate IT breachedMedtronic · breach · ShinyHunters · 9M claimed
- 24 Apr 2026UK Biobank health and genetic data listed for saleUK Biobank · breach · Unknown · 500K records
- 22 Apr 202619 million French ID agency records allegedly stolenFrance Titres (ANTS) · breach · breach3d · 19M claimed
- 8 Apr 2026Hackers take 7.7TB of LAPD files from city attorneyLA City Attorney (LAPD files) · breach · World Leaks
- 8 Apr 2026Eurail passport data offered for saleEurail · breach · Unknown · 300K records
2026 year to date
Incidents YTD42January to April 2026
Outages YTD14significant outages
Breaches YTD28data breaches
Critical YTD19outages and breaches
Records exposed YTD113Mconfirmed or company-reported
| Month | Outages | Breaches | Critical | Running total |
|---|---|---|---|---|
| Jan | 3 | 7 | 5 | 10 |
| Feb | 6 | 7 | 5 | 23 |
| Mar | 2 | 7 | 5 | 32 |
| Apr | 3 | 7 | 4 | 42 |
| Total | 14 | 28 | 19 | 42 |
Cite this
Nuffield Consulting, “Outages & Breaches: April 2026 in numbers”, The Daily Tech Wire,published April 2026. https://techwire.nuffieldconsulting.com/reports/2026-04/ (retrieved 15 Nov 2026).
The underlying data for every month is in the CSV download.