Almeida Law Group is investigating a data breach at Fishbrain AB. The breach occurred on July 30th, 2026. If you were affected, contact Almeida Law Group.
About Fishbrain AB
Fishbrain AB is a Stockholm, Sweden-based company founded in 2012 that develops a mobile app, social network, and commerce platform for sport fishing. The app allows anglers to log catches, discover fishing spots, share photos, connect with other anglers, and purchase fishing tackle. The company reports more than 15 million active anglers on its platform. Because Fishbrain collects account credentials, contact details, and personal identifiers from its large user base, a breach of its systems carries meaningful risk for affected users.
What Happened?
Fishbrain AB was listed in a California Attorney General sample breach notice filed on September 1st, 2026. According to that notice, on August 19th, 2026, Fishbrain discovered that an unauthorized person had accessed an environment used to host user data. On August 24th, 2026, Fishbrain determined that the unauthorized person had accessed information associated with certain users’ login credentials, among other things. The unauthorized access is believed to have begun as early as July 30th, 2026. The personal information involved included first and last name, email address, telephone number, Fishbrain username, country information, password hash, corresponding salt, and date of birth. Fishbrain has disclosed that passwords were not stored in plaintext but that the compromised password hashes for some users may be susceptible to being decoded — a notable disclosure suggesting weaker hashing was used for at least some accounts.
In response, Fishbrain patched the vulnerability, restricted access to the affected environment, reset passwords for affected accounts, and terminated active sessions. The company is also enhancing its security protocols and monitoring its systems. No ransomware group claims, threat-actor attributions, or independent cybersecurity media coverage of this incident were identified beyond the California Attorney General filing.
Key Facts at a Glance
- Company or Organization: Fishbrain AB
- Industry: Social/Platform Software — Outdoor Recreation / Sport Fishing
- Location: Sveävägen 15, 111 57 Stockholm, Sweden
- Incident type: Unauthorized access to user data environment
- Date of breach: July 30th, 2026
- Date breach discovered: August 19th, 2026
- Date of consumer notification: September 1st, 2026
- Data types exposed: First and last name, email address, telephone number, Fishbrain username, country information, password hash, corresponding salt, date of birth
- Source: California Attorney General Breach Report (sb24-629190) | Fishbrain Breach Notification Letter | Bloomberg Company Profile | Crunchbase — Fishbrain
What Should You Do?
If you received a notice from Fishbrain, you should immediately update your password on any other online account where you used the same password or username and email combination, since exposed password hashes for some accounts may be decodable. Consider placing a fraud alert or credit freeze with the three major credit bureaus — Equifax, Experian, and TransUnion — to help prevent new accounts from being opened in your name. Monitor your existing financial accounts for any suspicious activity and review your free credit reports at AnnualCreditReport.com. If you believe your information has already been misused, visit IdentityTheft.gov for step-by-step guidance on reporting and recovery.
Your Legal Rights
If your personal information was involved in this breach, you may have legal rights depending on the facts of the incident and the law in your state. Almeida Law Group represents consumers in data breach and privacy litigation and can help you evaluate whether you may have a claim. Contact us at (708) 529-5418 or through our contact page for a free case evaluation.
