Mother of All Breaches Data Breach History

This page tracks the Mother of All Breaches data breach history and cybersecurity incidents affecting Mother of All Breaches. BreachHistory currently indexes 9 publicly disclosed or catalogued incidents spanning 2024 through 2026, with approximately 56.8 billion records reported as exposed across all indexed events. These totals may include overlapping datasets or third-party estimates and should not be interpreted as unique affected users.

The Mother of All Breaches breach timeline includes major data breaches, cyber attacks, data leaks, credential exposures, API abuse, and other security incidents. Each incident provides details on the estimated records exposed, attack method, affected data types, and supporting public sources. Currently, 0 incidents are company-confirmed, while 1 remain unverified claims pending independent verification.

Largest Mother of All Breaches Data Breaches

The largest indexed incidents include the 2024 MOAB — 26B records, the 2025 Global infostealer credential mega-compilation — ~16B login pairs publicized …, and the 2026 Cybernews — exposed Elasticsearch; ~8.7B Chinese citizen/business records (Jan), along with additional historical incidents involving exposed passwords, public databases, and large-scale data scraping. Record counts originating from threat actors or leak sites should be treated as estimates unless confirmed by Mother of All Breaches or a regulator. Below is the list of large data breaches:

• 2024 2024 MOAB — 26B records — about 26.0B records exposed · Catalogued incident
• 2025 2025 Global infostealer credential mega-compilation — ~16B login pairs publicized (June) — about 16.0B records exposed · Catalogued incident
• 2026 2026 Cybernews — exposed Elasticsearch; ~8.7B Chinese citizen/business records (Jan) — about 8.7B records exposed · Catalogued incident
• 2026 2026 UpGuard — exposed Elasticsearch (Hetzner); ~3B+ emails/passwords & ~2.7B+ SSN-class rows (Jan) — about 5.7B records exposed · Catalogued incident
• 2025 2025 Fowler / open Elasticsearch — ~184M login rows (plaintext passwords; May) — about 184.2M records exposed · Catalogued incident
• 2026 2026 Fowler — ~149M login rows in open DB (~96 GB); infostealer aggregation (Jan) — about 149.4M records exposed · Catalogued incident
• 2026 2026 Cybernews — open French cloud DB; ~45M aggregated voter/health/finance/vehicle rows (Jan) — about 45.0M records exposed · Catalogued incident
• 2026 2026 Fowler — stalkerware DB exposed 86,859 screenshots; celebrity/influencer chats leaked — about 86.9K records exposed · Catalogued incident

What Information Was Exposed?

Depending on the incident, exposed data may include email addresses, passwords and login credentials, Social Security numbers and national IDs, phone numbers, names, physical addresses, and other personal information (PII). The exact data varies between incidents, so review each breach page before assuming your information was affected.

Mother of All Breaches Data Breach 2026

At the time of this update, BreachHistory catalogues 6 2026 incidents related to Mother of All Breaches. Most recent entry: 2026 Cybernews — open French cloud DB; ~45M aggregated voter/health/finance/vehicle rows (Jan). New incidents are added as official disclosures, regulatory filings, or credible cybersecurity reports become available.

What To Do If You Were Affected

If you believe your account may have been involved in a Mother of All Breaches data breach, change any reused passwords, enable multi-factor authentication (MFA), monitor your account for suspicious activity, and be cautious of phishing emails or fake breach notifications.

This Mother of All Breaches breach history is maintained by BreachHistory using public disclosures, regulatory filings, security research, and clearly labelled third-party claims. For the complete breach timeline, records exposed, incident details, and AI Breach Risk Score, explore the sections on this page.