Security vulnerabilities and automated fixes for mitm issues
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A high-severity vulnerability was discovered in a web application's file download pipeline where the `nodejs-file-downloader` dependency was used without any cryptographic verification of downloaded content. Without checksum or signature validation, attackers positioned between the server and client could silently swap legitimate files for malicious ones. This fix closes that window by enforcing integrity verification before any downloaded content is trusted or executed.
A critical vulnerability in a Python build script allowed potential man-in-the-middle attackers to bypass SHA256 checksum verification by serving malicious checksums alongside compromised binaries. This fix implements proper cryptographic signature verification, ensuring that downloaded artifacts are genuinely from trusted sources—not just matching a potentially tampered checksum file.