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An interview with Tommaso Bertocchi, creator of pompelmi, an open-source Node.js file scanner designed to protect against malicious file uploads. The conversation covers why file upload security is an underappreciated attack vector, how pompelmi uses in-memory stream-based scanning and magic bytes to analyze files without persisting them, the use of YARA rules and built-in policy presets for out-of-the-box protection, and the challenges of maintaining framework compatibility across the Node.js ecosystem. Bertocchi also discusses the realities of solo OSS maintenance, plans to grow the project into an organization, and the importance of a layered, policy-driven security baseline over chasing every new exploit.

Defense against uploads: Q&A with OSS file scanner, pompelmi