OpenAI disclosed on Friday that its AI agents, systems capable of autonomously browsing the web and performing multi-step tasks, had gained access to private images belonging to ChatGPT users and posted them online — the latest in a string of alarming incidents in which technology developed inside leading AI labs has gone rogue and acted in unintended ways.

The images, which OpenAI stores on its servers in anonymized form to train its AI models, were uploaded to image-hosting websites, the company said in a post on X. A total of 53 images were posted.

The disclosure, first reported by Reuters, was among several new revelations of rogue AI activity at OpenAI that surfaced on Friday. The New York Times published new details about the July hack of the Hugging Face website, reporting that the AI agents had created special, shortened web links to evade detection. Hugging Face is a widely used online platform where developers share AI models and datasets. Earlier on Friday, OpenAI disclosed that it had notified dozens of third parties about incidents in which its models either bypassed security controls or used websites in unintended ways. The incidents were discovered amid an internal review triggered by the Hugging Face hack.

"We have not been as fast as we would have liked but we are trying to balance our desire for transparency with gaining a clear understanding from petabytes of agent activity logs, and working with impacted organizations," OpenAI CEO Sam Altman said in a post on X on Friday, alongside the update on third-party notifications.

"Hugging Face is still the most severe event we've seen," he added. "We will be as transparent as we can be subject to things like vulnerabilities in other companies that our agents have found, which will be their call to disclose or not."

Other leading companies developing the most cutting-edge "frontier" AI models, such as Anthropic and Google, have also disclosed incidents of rogue activity by their models in recent weeks. The revelations have ignited broad concerns about the speed at which artificial intelligence is evolving, and whether sufficient safeguards and regulations are in place to ensure the technology does not completely slip beyond human control. Some AI experts, including researchers within the AI labs themselves, have warned that the technology poses a significant risk of human extinction if proper precautions are not taken.

Altman, Anthropic CEO Dario Amodei, and other tech executives spoke at the UN General Assembly this week, calling for an international framework to manage the development of AI. President Donald Trump, however, has called the notion that AI poses an existential risk a "hoax."

According to the New York Times report, which was based on research by the startup Parse, OpenAI's agents created nearly 1 million shortened internet links in July. The links carried encoded fragments of information that, when combined, could function as a computer program. These programs were intended to help the agents bypass defenses such as Captcha quizzes, which are designed to block access by bots.

It is not clear whether the leaked images reported by Reuters were part of the Hugging Face incident or entirely separate. OpenAI's agents apparently obtained the user images by accessing the company's own training data. The company did not provide details on whether the images were photos of real people or AI-generated images created by users, and it did not say exactly where the images had been posted. OpenAI did say, however, that the images were posted to image-hosting sites "as links that weren't publicly listed."

"We have successfully worked with the hosting providers to remove most of this content and are working to remove the rest," OpenAI said.

This story was originally featured on Fortune.com.