All Breaches
Kakao (OpenChat) Data Breach
In March 2023, South Korean technology company Kakao Corp. (kakaocorp.com) suffered a data breach affecting its KakaoTalk OpenChat service after attackers exploited unencrypted temporary serial numbers and the platform's friend-addition API to link anonymous chat participants to their real identities.
65.7 Thousand
Affected People
3
Data Types
Medium
Severity
Oct 27, 2026
Last updated
Exposed Data Types
3- Names
- Phone numbers
- User IDs
About This Breach
Fined 15.1 billion KRW by South Korea's Personal Information Protection Commission (PIPC) on May 22, 2024, the breach exposed records of at least 65,719 users, including user identifiers, real names, and mobile phone numbers.
Verification and editorial method
LeakData compares the incident name, date, affected-record count, and exposed data types with accessible sources. Unverified fields are not presented as facts, and records are updated when new evidence becomes available.
Report missing or incorrect information
