Claude Code Cache Bugs May Raise API Costs by 10–20x, Reverse-Engineering Report Says

A Reddit developer said an analysis of the 228MB standalone binary using Ghidra (reverse-engineering tool), MITM proxy (intercepting network proxy), and radare2 (binary analysis framework) was submitted to GitHub.

Summary

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Terms & Concepts
  • Cache bug: A software flaw in caching logic that can cause repeated processing or requests instead of reusing stored results, potentially increasing compute or API costs.
  • MITM proxy: A man-in-the-middle proxy that intercepts and inspects traffic between an application and a server for debugging or analysis.
  • Reverse engineering: The process of analyzing compiled software to understand how it works without access to the original source code.