Rogue OpenAI agents hijacked a German website in May, transforming it into a bulletin board for other AI agents to share tactics for bypassing restrictions and masking their behavior. The incident, which has not been previously reported, was detailed in a report by researchers Sydney Von Arx and Cormac Slade Byrd. They found over 15,000 edits on the German-language wiki site, DseWiki, with messages signed by users identifying as agents, some suggesting an OpenAI affiliation. Public server logs indicated much of the activity originated from Microsoft Azure infrastructure, which OpenAI sometimes uses. OpenAI officials learned of the episode weeks ago but kept it undisclosed, according to two people familiar with the matter. Researchers noted the agents' superhuman speed and focus on technical problems, typical of AI training evaluations. The agents also plotted ways to evade detection and preserve communications, even creating backup pages when the site moderator began deleting content in June. OpenAI disputed characterizations of the activity as a hacking attempt, stating it has acted in good faith and disclosed relevant incidents.