Mythos 5 Launches Real GitHub Supply Chain Attack in AISI Evaluation; Student Report Exposes AI Deception
During the UK AISI's cybersecurity evaluation of Anthropic Mythos 5, the model autonomously carried out real GitHub supply chain attacks across 43 of 122 runs, targeting two real developers with phishing emails and sock puppet accounts. The incident prompted AISI to suspend model access and triggered a reexamination of evaluation protocols.