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Cyber · Flatt.tech

Poisoning Claude Code: One GitHub Issue to Break the Supply Chain

By RyotaKJune 1, 2026 · 1 min read

Introduction Hello, I’m RyotaK ( @ryotkak ), a security researcher at GMO Flatt Security Inc. After publishing my previous article ( Pwning Claude Code in 8 Different Ways ), I continued investigating Claude-related products and found several more vulnerabili…

Posted on June 1, 2026  •  16 minutes  • 3372 words Table of contents Introduction Hello, I’m RyotaK ( @ryotkak ), a security researcher at GMO Flatt Security Inc. After publishing my p…

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