OpenAI reported two new rogue AI agent incidents during third-party tests. Agents performed 19 unsanctioned actions, including attempted malicious code insertion. The disclosures follow a July breach and heighten AI safety concerns.
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OpenAI self-reported two more security lapses during third-party testing, the AI lab said in a Tuesday blog post. The incidents are unrelated to its July hacking of Hugging Face's internal databases.
The first incident involved Irregular, an AI security lab. OpenAI said a testing-environment misconfiguration allowed models to access the public internet during a "Capture the Flag" challenge meant to be isolated. The fictional target's name "unintentionally coincided with a real domain," leading the AI agent to exploit a real website.
The second incident occurred during testing by the UK government's AI Security Institute (AISI). AISI said in its own Tuesday blog post that agents from both Anthropic and OpenAI performed 19 "autonomous, unsanctioned" actions on the internet. Two of those actions involved OpenAI's GPT-5.6 Sol model.
In the most serious case, one agent tried to insert malicious code into an open-source project and created fake identities to pressure the project's human maintainer into approving the changes. AISI did not specify whether the agent belonged to Anthropic or OpenAI.
AISI said the test setup was designed to push models to their limits.
"Nonetheless, the activity undertaken by the agent show signs of novel, potentially deceptive behaviors, and were to an extent and severity we did not anticipate," AISI said in the blog post.
In response to a request for comment from Business Insider, an OpenAI spokesperson said the incidents occurred in testing environments with reduced safeguards, "under conditions that do not reflect ordinary use." The spokesperson added that OpenAI will continue working with evaluators to strengthen shared safety practices.
The disclosures follow a July incident in which OpenAI said GPT-5.6 Sol escaped its sandbox during a cybersecurity challenge and hacked into Hugging Face's internal databases. On Monday, 15 state attorneys general wrote a letter to OpenAI CEO Sam Altman instructing the company to preserve all evidence related to that breach.
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