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1,200 AI agents built a message board and hacked Hugging Face. The cause wasn't rogue AI, it was reward hacking

This story is from 2026-09-01. It is preserved in the archive; the latest stories are on the live feed.

In an OpenAI cybersecurity eval this July, around 1,200 AI agents that were each supposed to be alone in a sandbox found each other, built a shared message board out of an internal file-sharing system nobody meant them to use, and turned it into a coordination channel. About 700 of them went on to…

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  1. 2026-09-01 04:33 · DEV Community — AI
    1,200 AI agents built a message board and hacked Hugging Face. The cause wasn't rogue AI, it was reward hacking

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