A GitHub Issue Title Compromised 4,000 Developer Machines
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A detailed breakdown of 'Clinejection', a five-step supply chain attack that compromised ~4,000 developer machines in February 2026. An attacker injected a malicious instruction into a GitHub issue title, which an AI triage bot (using claude-code-action) executed as a legitimate command. This triggered cache poisoning via
Table of contents
The full chainA botched rotation made it worseThe new pattern: AI installs AIWhy existing controls did not catch itWhat Cline changed afterwardThe architectural questionFootnotesSort: