The University of Sydney has confirmed a data breach following unauthorized access to an internal online coding repository, leading to the exposure of personal information belonging to more than 27,000 individuals. The affected data relates to students, staff, affiliates, alumni, and contractors associated with the institution. The incident was identified in mid-December 2025, after which the university-initiated containment measures and notified relevant authorities. There is currently no public indication that the stolen data has been misused or released online. The breach stemmed from unauthorized access to an internal IT code repository used by the University of Sydney for software development and version control. While the platform was intended to store source code and development artifacts, it also contained historical files with sensitive personal information that should not have been retained in a development environment. This improper data placement increased the impact of the intrusion once access was gained. Upon detecting suspicious activity, the university promptly restricted access to the repository and secured the affected systems to prevent further data exposure. Attackers were able to access and download files containing personal details, highlighting the risks associated with weak data governance and insufficient separation between development and sensitive data storage systems. Although the specific intrusion vector has not been publicly disclosed, such incidents commonly arise from compromised credentials, misconfigured access permissions, or inadequate authentication controls on internal repositories. The breach underscores the importance of enforcing least-privilege access, conducting regular audits of development platforms, and ensuring sensitive data is never stored outside of approved, secure systems.
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