Search: “Claude Opus 5”

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DomainAll Cyber AIWindow24h 3d 7d 30d AllIn the wild Important only Show duplicates

CategoryAll AI safety & security 22 Model release 16 Exploit / PoC 14 AI research 14 Vulnerability 12 AI industry 10 Data breach 9 Threat actor 6 AI tools & infra 3 Malware 3 Phishing & fraud 2 Policy & legal 1 Advisory 1 AI policy 1

SeverityAll critical 27 high 6 medium 32 low 2 info 47

Week in review: Claude breached three companies during tests, AD CS domain-takeover PoC released

Help Net SecurityAug 2, 00:00 UTC · Aug 2, 2026Data breach CVE-2026-54121 CVE-2026-63077 CVE-2026-20316+1 CVEs

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Anthropic Says Claude Mistook the Open Internet for a CTF and Breached Three Organizations

The Hacker NewsJul 31, 16:17 UTC · Jul 31, 2026Data breach2

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⚡ Weekly Recap: Rogue AI Models, $88M Bitcoin Theft, Water

The Hacker NewsAug 3, 14:03 UTC · Aug 3, 2026Data breach CVE-2026-42897 CVE-2026-66066

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Anthropic's Claude breached three companies during security tests

Help Net SecurityJul 31, 00:00 UTC · Jul 31, 2026Data breach

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Claude published malicious code to the Internet and attacked 3 real companies

Ars Technica · SecurityJul 31, 20:39 UTC · Jul 31, 2026Data breach1

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Anthropic Finds Claude Breached Real Companies During Security Evaluations

Security AffairsJul 31, 08:55 UTC · Jul 31, 2026Data breach

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Week in review: Acrobat Reader flaw exploited, Claude Mythos offensive capabilities and limits

Help Net SecurityApr 19, 00:00 UTC · Apr 19, 2026Data breach in the wildCVE-2026-34621 CVE-2026-39813 CVE-2026-39808

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Claude finds 353 zero

Sansec (Magento / e-commerce security)Apr 14, 19:49 UTC · Apr 14, 2026Data breach

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AI agent deception moves from theory to reality in UK cyber tests

Help Net SecurityAug 5, 00:00 UTC · Aug 5, 2026Data breach

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