People search MyFitnessPal data breach timeline because regulated data and trust are existential—one incident triggers class actions and regulator exams. BreachHistory indexes 6 MyFitnessPal-linked incidents, with headline counts up to 150M+ in catalog rows. This page maps every attested event through 2026 with internal links to canonical records.
Why MyFitnessPal breach history matters
MyFitnessPal operates in Healthcare. Across indexed rows, recurring themes include mixed intrusion and disclosure events. Understanding the chronological pattern helps security teams, customers, and regulators separate confirmed disclosures from forum marketing.
Full timeline through 2026
2026 — ~72.7M emails in HIBP reload (Jan)
Cataloged incident. Have I Been Pwned and consumer-data roundups in January 2026 surfaced a large Under Armour / MyFitnessPal–labeled credential or email set on the order of ~72.7 million addresses, widely interpreted by analysts as renewed visibility of recycled 2018 breach material, stealer logs, or reindexed forum dumps rather than a freshly confirmed perimeter intrusion at the same scale. Treat as a disclosure/indexing event pending any new Under Armour forensic statement distinct from the historic MyFitnessPal incident. Exposed categories include Email addresses and related credential or account metadata as indexed—overlap with 2018 incident expected. BreachHistory cites approximately 72.7M+ affected records in this row. See the under-armour 2026 record and canonical BreachHistory entry.
2018 — — MyFitnessPal: Under Armour says roughly 150 million MyFitnessPal…
Cataloged incident. Under Armour says roughly 150 million MyFitnessPal users are affected by a breach of their wildly popular fitness app MyFitnessPal, which it discovered earlier this week. It said on Thursday that an unauthorized party acquired data about these users late last month.Under Armour is working with leading data security firms to assist in its investigation, and also coordinating with law enforcement authorities, the company said in a statement. The investigation indicates that the affected informati Exposed categories include Personal information. BreachHistory cites approximately 150M+ affected records in this row. See the under-armour2018 and canonical BreachHistory entry.
2018 — — MyFitnessPal: Feb, 150.0M records
Cataloged incident. Feb. Usernames, email addresses, and hashed user passwords were stolen. BreachHistory cites approximately 150M+ affected records in this row. See the under-armouru and canonical BreachHistory entry.
2018 — — MyFitnessPal: Hacking, 15,000,000 records
Cataloged incident. A breach of usernames, email addresses, and hashed passwords belonging to users of the fitness app. Exposed categories include Personal and demographic data. BreachHistory cites approximately 15M+ affected records in this row. See the under-armour2018-iib and canonical BreachHistory entry.
2018 — 150M accounts
Cataloged incident. Under Armour subsidiary. Feb 2018, disclosed March. Exposed categories include Usernames, emails, hashed passwords. BreachHistory cites approximately 150M+ affected records in this row. See the myfitnesspal-ua-2018 and canonical BreachHistory entry.
2012 — — MyFitnessPal: A flash drive that contained Under Armour employee…
Cataloged incident. A flash drive that contained Under Armour employee payroll information was lost by PricewaterhouseCoopers. The information was being transmitted via mail for auditing purposes and went missing on or around April 12. Employee names, Social Security numbers, and salary information could have been exposed. it is unclear how many people were affected in the U.S. Under Armour employs 5,400 people worldwide. Exposed categories include Personal information. No attested victim count is published for this row yet. See the under-armour2012 and canonical BreachHistory entry.
Patterns and analysis
- Mixed intrusion and disclosure events — appears across multiple MyFitnessPal catalog entries; prioritize controls that address this class of failure.
- Record-count hygiene — BreachHistory indexes actor-cited figures separately from company-confirmed totals; read each row's technicalWriteup before treating counts as fact.
- 2026 monitoring — New disclosures roll into this timeline as they are verified or labeled unverified per catalog policy.
What to do if you may be affected
- Step 1: Enable phishing-resistant MFA on every account tied to this brand.
- Step 2: Use unique passwords and a password manager—breach rows often involve credential reuse.
- Step 3: Monitor official company breach notices and regulator filings, not dark-web downloads.
- Step 4: Watch for medical-ID theft and billing fraud after health-data incidents.
- Step 5: Bookmark the MyFitnessPal company page for new 2026+ disclosures.
Canonical BreachHistory hub
Explore every indexed row: breachhistory.com/under-armour · Latest: under-armour2026.
Sources: BreachHistory catalog (6 rows for MyFitnessPal), company and regulator disclosures cited in individual breach records.