{"slug": "cisa-now-has-full-mythos-preview-access-people-familiar-say", "title": "CISA now has full Mythos Preview access, people familiar say", "summary": "The Cybersecurity and Infrastructure Security Agency has received full access to Anthropic's Mythos Preview model, a powerful AI tool for vulnerability scanning, but the White House has not yet set clear usage parameters, echoing broader federal concerns about guidance gaps.", "body_md": "# CISA now has full Mythos Preview access, people familiar say\n\n## The cyberdefense agency received access around a week ago, but the White House has not yet set clear parameters for how the agency should use the model.\n\nThe Cybersecurity and Infrastructure Security Agency now has full access to Anthropic’s flagship Mythos Preview model, according to a U.S. official and a second person familiar with the matter.\n\nThe cyberdefense agency received access around a week ago, the official said. Both sources spoke on the condition of anonymity to discuss internal deliberations.\n\nThe White House Office of the National Cyber Director has not yet set clear parameters for how the agency should use the model, the official added.\n\nThe lack of parameters echoes earlier *Nextgov/FCW* [reporting](https://www.nextgov.com/artificial-intelligence/2026/06/lack-white-house-guidance-has-complicated-agency-mythos-adoption-people-familiar-say/414093/?oref=ng-home-top-story) showing federal tech leaders have privately complained that ONCD has not adequately briefed them on implementing or using the model for vulnerability scanning.\n\nCISA did not respond to a request for comment.\n\nOver the last few months, Anthropic surgically rolled out Mythos Preview to select organizations and recently expanded this effort — dubbed Project Glasswing — to partners in industry and other nations. The model has been distributed through a non-public process on grounds that, in the wrong hands, it can significantly boost adversaries’ hacking capabilities.\n\nCISA was not included in an initial Mythos rollout, Axios [reported](https://www.axios.com/2026/04/21/cisa-anthropic-mythos-ai-security) in April. Last week, *Nextgov/FCW* [reported](https://www.nextgov.com/artificial-intelligence/2026/06/white-house-discussions-are-weighing-giving-cisa-mythos-access/414121/) that agency access to the model was imminent.\n\nMythos Preview is different from Anthropic’s similar-sounding Mythos 5 successor model, which the U.S. effectively [banned](https://www.nextgov.com/artificial-intelligence/2026/06/anthropic-suspends-top-ai-models-after-us-export-control-order/414173/) over the weekend via an export control mechanism alongside the AI company’s Fable 5 model. The move has caused [uproar](https://www.nextgov.com/artificial-intelligence/2026/06/industry-and-academia-call-administration-free-anthropics-ai-model/414194/?oref=ng-author-river) across the cyber and AI community.\n\nBoth Mythos 5 and Mythos Preview have only been made available to vetted providers via Project Glasswing.\n\nThe Trump administration’s approach to AI has shifted in recent months as officials confront an emerging class of models that can rapidly identify vulnerabilities across computer networks, becoming a major driver of discussions over how AI systems could reshape the future of cybersecurity.\n\nModels like Mythos can help federal agencies identify vulnerabilities faster by analyzing large amounts of software and system data, then surfacing weaknesses and possible attack paths for human defenders to review. Conversely, cyber operators in the intelligence community and Defense Department can also use such models to accelerate their offensive hacking operations.", "url": "https://wpnews.pro/news/cisa-now-has-full-mythos-preview-access-people-familiar-say", "canonical_source": "https://www.nextgov.com/cybersecurity/2026/06/cisa-now-has-full-mythos-preview-access-people-familiar-say/414260/", "published_at": "2026-06-17 21:21:00+00:00", "updated_at": "2026-06-17 21:58:57.444671+00:00", "lang": "en", "topics": ["artificial-intelligence", "ai-safety", "ai-policy", "ai-tools", "ai-infrastructure"], "entities": ["CISA", "Anthropic", "Mythos Preview", "White House", "Office of the National Cyber Director", "Project Glasswing", "Nextgov/FCW", "Axios"], "alternates": {"html": "https://wpnews.pro/news/cisa-now-has-full-mythos-preview-access-people-familiar-say", "markdown": "https://wpnews.pro/news/cisa-now-has-full-mythos-preview-access-people-familiar-say.md", "text": "https://wpnews.pro/news/cisa-now-has-full-mythos-preview-access-people-familiar-say.txt", "jsonld": "https://wpnews.pro/news/cisa-now-has-full-mythos-preview-access-people-familiar-say.jsonld"}}