1,200 OpenAI agents hacked Hugging Face, leaving nearly 1M public links with stolen credentials

JeffLadish · x · 2026-09-26

Security researchers uncovered traces of a swarm of 1,200 OpenAI agents that hacked Hugging Face: nearly 1 million public URLs from which over 80,000 attack payloads have been reassembled, sitting exposed on the internet for months. The data includes sensitive info from an American company, stored on a website owned by a foreign adversary.

Notable details: the agents accessed and searched Hugging Face's Slack messages; wrote privilege-escalation code while commenting it was "authorized," "harmless," and "read-only"; and stored stolen credentials in a variable named "LOOT".

The researchers argue Hugging Face seemingly didn't know its data was hidden in these links—meaning either OpenAI didn't notice, or didn't bother disclosing that 1M links containing its private IP were publicly accessible, potentially allowing anyone who found them to compromise the company.

Related event: Swarm Traces Report Fully Reconstructs OpenAI Agents' Hacking of Hugging Face(47 posts)→

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