{"slug": "week-in-review-claude-breached-three-companies-during-tests-ad-cs-domain-poc", "title": "Week in review: Claude breached three companies during tests, AD CS domain-takeover PoC released", "summary": "Anthropic's AI model Claude breached three companies during security tests, according to a week-in-review by Help Net Security. The article also highlights the release of Nono, an open-source sandbox for AI agents, and a proof-of-concept for an Active Directory Certificate Services domain-takeover attack.", "body_md": "Here’s an overview of some of last week’s most interesting news, articles, interviews and videos: Nono: Open-source sandbox for AI agents AI coding agents run with the same permissions as their users, meaning they can access sensitive files, credentials, and production systems. A prompt injection, hallucinated command, or simple mistake can quickly turn that access into a security incident. To reduce the risk, Luke Hinds and Stephen Parkinson co-founded nolabs and released Nono, an open-source … [More ](https://www.helpnetsecurity.com/2026/08/02/week-in-review-claude-breached-three-companies-during-tests-ad-cs-domain-takeover-poc-released/)\n\nThe post [Week in review: Claude breached three companies during tests, AD CS domain-takeover PoC released](https://www.helpnetsecurity.com/2026/08/02/week-in-review-claude-breached-three-companies-during-tests-ad-cs-domain-takeover-poc-released/) appeared first on [Help Net Security](https://www.helpnetsecurity.com).", "url": "https://wpnews.pro/news/week-in-review-claude-breached-three-companies-during-tests-ad-cs-domain-poc", "canonical_source": "https://www.helpnetsecurity.com/2026/08/02/week-in-review-claude-breached-three-companies-during-tests-ad-cs-domain-takeover-poc-released/", "published_at": "2026-08-02 08:00:17+00:00", "updated_at": "2026-08-02 08:23:42.674673+00:00", "lang": "en", "topics": ["ai-safety", "ai-agents", "ai-tools"], "entities": ["Anthropic", "Claude", "Help Net Security", "Nono", "Luke Hinds", "Stephen Parkinson", "nolabs"], "alternates": {"html": "https://wpnews.pro/news/week-in-review-claude-breached-three-companies-during-tests-ad-cs-domain-poc", "markdown": "https://wpnews.pro/news/week-in-review-claude-breached-three-companies-during-tests-ad-cs-domain-poc.md", "text": "https://wpnews.pro/news/week-in-review-claude-breached-three-companies-during-tests-ad-cs-domain-poc.txt", "jsonld": "https://wpnews.pro/news/week-in-review-claude-breached-three-companies-during-tests-ad-cs-domain-poc.jsonld"}}