dev.to· Oct 25, 2026· by gabrielanhaia

A Claude Code Hook That Times Out Lets the Command Through. Make It Fail Closed

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A Claude Code guard hook that crashes or times out lets the command run. Build one, break it twice, then set onFailure: block and watch it fail closed.
🎯 Vulnerability: Web Security Vulnerability
💡 Defense Fix: Implement strict input validation, contextual output encoding, and enforce least-privilege authorization controls.
#ai#security#tutorial#devtools

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