MyFitnessPal Data Breach

What happened

In February 2018, the diet and exercise service MyFitnessPal suffered a data breach. The incident exposed 144 million unique email addresses alongside usernames, IP addresses and passwords stored as SHA-1 and bcrypt hashes (the former for earlier accounts, the latter for newer accounts). In 2019, the data appeared listed for sale on a dark web marketplace (along with several other large breaches) and subsequently began circulating more broadly.

Exposed data

Recommended actions

• Change your MyFitnessPal password immediately, and update it anywhere you reused the same password.
• Enable two-factor authentication on the affected account and on your critical services (email, banking).
• Watch for targeted phishing emails referencing MyFitnessPal — attackers weaponise breach data quickly.
• Check whether your email address appears in this breach on haveibeenpwned.com.