Confirmed: SoundCloud data breach hit 29.8 million accounts - how to find out if you're affected

• SoundCloud breach exposed ~30 million user emails and profile data in December 2025
• Attackers attempted extortion before publicly releasing stolen information
• ShinyHunters linked to breach, continuing Okta SSO-targeted campaigns

We now have confirmation exactly how many people were affected by the December 2025 breach at SoundCloud, as well as how users can check if they are affected.

In mid-December 2025, SoundCloud confirmed suffering a cyberattack and losing sensitive data on about 20% of its user base - approximately 28 million people.

The company did not share the exact number of affected users, but BleepingComputer picked up that Have I Been Pwned? (HIBP) Added 29.8 million accounts to its platform. HIBP is a database of email addresses stolen in different breaches, where people can see if their addresses were exposed.