# MapleStory Universe Breach Exposes User Data and API Keys for 328 Apps

By Simon Yoon

Canonical URL: https://www.tokenpost.com/news/technology/56108
Published: 2026-11-13T00:37:18.000Z
Updated: 2026-11-13T00:37:18.000Z
Section: Technology

> The blockchain gaming project suspended services after discovering unauthorized access to off-chain servers Nov. 12. It said its blockchain and smart contracts were unaffected.

MapleStory Universe suspended all services after unauthorized access to some of its off-chain servers exposed user information and API keys linked to 328 applications, the blockchain gaming project said.

The intrusion was discovered Nov. 12, triggering an emergency security review and a platform shutdown. The preliminary investigation found that accessed data included some users’ wallet addresses, login IP addresses, device information, some email addresses and linked social accounts. API keys and related information for 328 applications registered through the developer center were also affected.

MapleStory Universe said its blockchain and smart contracts were unaffected, no assets had been transferred or stolen, and operational private keys were not exposed. The team closed the attack path and replaced affected servers. Services are expected to resume after the project rotates operational keys and completes security checks.

The breach’s reported scope included both off-chain user data and credentials for apps registered through the developer center.