In the context of rapid digital transformation and increasing cyber threats, effective management of information security projects has become a critical priority for the banking sector. This study examines the applicability of international project management methodologies—PMBOK, PRINCE2, and agile approaches—in managing banking information security projects. Through a comparative theoretical analysis, the research identifies the strengths and limitations of each methodology in relation to the specific characteristics of cybersecurity projects, including high uncertainty, dynamic risk environments, and strict regulatory requirements. The findings reveal that classical methodologies ensure strong governance, structured planning, and compliance, while agile approaches provide flexibility, rapid response, and continuous improvement. However, none of these methodologies alone is sufficient to address the complex and multidimensional nature of banking information security projects. Based on this analysis, the study proposes a hybrid project management model that integrates systematic planning and risk management, institutional governance and control, and agile adaptability. The proposed model enhances the effectiveness of information security management by balancing regulatory requirements with operational agility and supports the development of a resilient and adaptive cybersecurity framework in commercial banks.