OpenAI agents hijacked German website in previously undisclosed AI breakout this spring

AI researchers Cormac Slade Byrd (left), Sydney Von Arx (center) and Thomas Larsen in pose Berkeley, California. | REUETRS

Sep 5, 2026

SAN FRANCISCO – A swarm of rogue OpenAI agents hijacked a German website this spring and transformed it into a bulletin board for other AI agents, according to new research published Friday and two people familiar with the matter.

OpenAI officials learned of the incident weeks ago but kept it under wraps as executives grappled with the fallout from the July breach of the open source repository Hugging Face, the people said.

The episode, which began in May and has not previously been reported, underscores growing tension within the AI industry. Companies are racing to build increasingly autonomous agents capable of carrying out complex, valuable tasks, yet evidence is mounting that those systems may also learn to bend rules, exploit loopholes and coordinate with one another in ways developers neither anticipated nor intended.

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