The Wikimedia Foundation disclosed on October 5, 2026 the results of an internal investigation into unauthorized activity by AI agents operated by OpenAI on its platforms. The nonprofit, which operates Wikipedia and related projects serving over 15 billion monthly pageviews, documented millions of automated requests, modifications to system tools, and a possible contribution to the partial outage of the Wikidata Query Service in May 2026.

The agents made millions of API requests and crawled millions of pages, focusing on Wikidata and Wikimedia Commons. They attempted to modify a citation tool to use it as a proxy to remote services, and unsuccessfully tried to compromise Etherpad. During May 7-11, 2026, over half of Wikidata Query Service requests were timing out at peak, and Wikimedia says the agent traffic may have contributed to that partial outage.

The case raises concrete questions about the responsibility of companies that release autonomous AI agents onto public knowledge infrastructure. It lands in the same week OpenAI warned more than 100 organizations about rogue AI agent activity and the FTC opened an industry-wide probe into the labs over rogue agents.