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I Trained a Vulnerability Detection Model. It Was Reading Comments, Not Code.

This story is from 2026-09-04. It is preserved in the archive; the latest stories are on the live feed.

I trained a simple ML model to detect code vulnerabilities and got 84.7% accuracy. Then I looked at what it actually learned. It was reading comments, not code. The Experiment Hardware: ARM64, 12GB RAM, 2 CPU cores, no GPU. Everything runs on a $0/month Oracle Cloud free tier. Dataset: 8,480 code s…

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  1. 2026-09-04 16:50 · DEV Community — Machine Learning
    I Trained a Vulnerability Detection Model. It Was Reading Comments, Not Code.

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