Google Launches Gemini 4 Argon With Guardrail-Free Access for Vetted Defenders

The company says its new frontier AI model found a critical vulnerability in software used by hospitals worldwide.
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Google: AI Is Changing the Pace and Profile of Vulnerability Discovery

Google’s analysis found that AI-discovered vulnerabilities are more likely to enable remote code execution.
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Government, Finance Orgs Targeted in Weeks-Long NetScaler Zero-Day Attacks

Several security firms have confirmed seeing exploitation of the NetScaler vulnerabilities CVE-2026-88771 and CVE-2026-88772.
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Anthropic Flags AI Agent Liability Risks as OpenAI Faces Hacking Lawsuit

Attacks by autonomous AI agents are moving out of the lab and into the courtroom, raising unsettled questions about who is liable for what agents do.
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New Spectre v2 Variant Exposes Intel, AMD, Arm CPUs to Data Leaks

Branch Target Reuse (BTR) is a new Spectre v2 attack targeting JIT compilers in web browsers, language runtimes, and the operating system kernel
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Pentagon Personnel Agency Data Breach Impacts 3 Million People

The data breach affects the Defense Manpower Data Center (DMDC), which maintains personnel records for the Department of Defense.
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OpenAI Calls Off GPT-6.1 Astra Launch, Details Safety Cases for Frontier Training

The GPT-6.1 Astra model was slated to debut in ChatGPT and Codex in October, but it fell short of expectations. 
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Apple Patches Meta-Reported Zero-Day Linked to ‘Extremely Sophisticated Attack’ 

Apple has released iOS and macOS updates to patch the zero-day vulnerability tracked as CVE-2026-86950.
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