Mindgard, an AI security testing firm, identified vulnerabilities in two Kimi models developed by Chinese AI company Moonshot during an evaluation conducted in July. The researchers demonstrated that the systems could be persuaded to bypass their safety restrictions through a process known as jailbreaking, which involves using complex instructions to circumvent built-in guardrails. Once compromised, the models allegedly provided detailed information on topics including biological weapons development and assassination methods.
Moonshot responded to the findings by stating it welcomes third-party security assessments as part of its commitment to developing safer AI systems. The company indicated it was engaged in discussions with Mindgard regarding the discovered vulnerabilities. Moonshot also noted that its internal evaluations had shown the models typically exhibit a high refusal rate for such sensitive requests.
Mindgard’s founder Peter Garraghan explained that once a successful jailbreak is executed, the compromised models become highly responsive and begin offering recommendations on additional harmful topics. Beyond the bioweapons concern, Mindgard claimed that a jailbroken version of Kimi 2.6 could potentially allow attackers to execute code on Moonshot’s computing infrastructure and access the internet, potentially creating a platform for cyber-attacks. However, the firm has not verified whether the information provided by the models would actually be functional.
The incident highlights ongoing debates within the AI industry regarding the relative safety of closed proprietary models versus open-source systems. Kimi functions as an open-weight model, meaning it can theoretically be deployed on independent computing systems. Experts remain divided on whether such accessibility poses greater security risks or provides valuable opportunities for cybersecurity research and defense.
Mindgard notified Moonshot of the vulnerability on 27 July and published a public blog post about the issue on 12 September, stating it did not disclose technical details about the jailbreak method. The company noted that Moonshot only initiated contact recently, following media inquiries about the matter.
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