Twitter (X) Data Breach History

This page tracks the Twitter (X) data breach history and cybersecurity incidents affecting Twitter (X) (United States). BreachHistory currently indexes 14 publicly disclosed or catalogued incidents spanning 2010 through 2023, with approximately 946.3 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 Twitter (X) 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 Twitter (X) Data Breaches

The largest indexed incidents include the 2018 — Twitter (X): A glitch caused some passwords to be stored in…, the 2010 — Twitter (X): May, 330.0M records, and the 2023 Database of 200M+ users published on BreachForums, 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 Twitter (X) or a regulator. Below is the list of large data breaches:

• 2018 2018 — Twitter (X): A glitch caused some passwords to be stored in… — about 330.0M records exposed · Catalogued incident
• 2010 2010 — Twitter (X): May, 330.0M records — about 330.0M records exposed · Catalogued incident
• 2023 Database of 200M+ users published on BreachForums — about 210.0M records exposed · Catalogued incident
• 2018 2018 — Twitter: Poor security / misconfiguration, 33,000,000 records — about 33.0M records exposed · Catalogued incident
• 2016 2016 — Twitter (X): Late last week, a password leak hit Twitter, and… — about 32.0M records exposed · Catalogued incident
• 2022 5.4M user records published (API vulnerability) — about 5.4M records exposed · Catalogued incident
• 2021 2021 — Twitter: Hacking, 5,400,000 records — about 5.4M records exposed · Catalogued incident
• 2013 250k accounts compromised (Java vulnerability) — about 250.0K records exposed · Catalogued incident

What Information Was Exposed?

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

Twitter (X) Data Breach 2026

At the time of this update, no Twitter (X) data breach has been catalogued for 2026. 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 Twitter (X) 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 Twitter (X) 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.