Meta Platforms Data Breach History

This page tracks the Meta Platforms data breach history and cybersecurity incidents affecting Meta Platforms (United States). BreachHistory currently indexes 12 publicly disclosed or catalogued incidents spanning 2013 through 2026, with approximately 993.9 million 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 Meta Platforms 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 2 remain unverified claims pending independent verification.

Largest Meta Platforms Data Breaches

The largest indexed incidents include the 2019 — Facebook: Poor security / misconfiguration, 540000000 records, the 2019 — Facebook: Poor security / misconfiguration, 267,000,000 records, and the 2021 — Facebook: Hacking, 53,300,000 records, 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 Meta Platforms or a regulator. Below is the list of large data breaches:

• 2019 2019 — Facebook: Poor security / misconfiguration, 540000000 records — about 540.0M records exposed · Catalogued incident
• 2019 2019 — Facebook: Poor security / misconfiguration, 267,000,000 records — about 267.0M records exposed · Catalogued incident
• 2021 2021 — Facebook: Hacking, 53,300,000 records — about 53.3M records exposed · Catalogued incident
• 2018 2018 — Facebook: Poor security / misconfiguration, 50000000 records — about 50.0M records exposed · Catalogued incident
• 2019 2019 — Facebook: Poor security / misconfiguration, 41,900,000 records — about 41.9M records exposed · Catalogued incident
• 2018 2018 — Facebook: Hacking, 29,000,000 records — about 29.0M records exposed · Catalogued incident
• 2013 2013 — Facebook: Accidentally published, 6000000 records — about 6.0M records exposed · Catalogued incident
• 2018 2018 — Facebook: Hacking, 5,000,000 records — about 5.0M records exposed · Catalogued incident

What Information Was Exposed?

Depending on the incident, exposed data may include health and medical (PHI) records, profile information, private messages and communications, and other personal information (PII). The exact data varies between incidents, so review each breach page before assuming your information was affected.

Meta Platforms Data Breach 2026

At the time of this update, BreachHistory catalogues 2 2026 incidents related to Meta Platforms. Most recent entry: 2026 Meta — Model Capability Initiative paused; employee prompts, tax & medical data exposed to all staff. 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 Meta Platforms 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 Meta Platforms 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.