[mythos]

July 8, 2026

• CISA is reportedly using Anthropic's "Mythos" model to scan U.S. government code repositories for flaws that could aid foreign spies or criminals, work led by its Attack Surface Evaluation team. SecurityWeek, Yle/NCSC-FI · Policy & Industry

in Synacktiv Drops a Kerberos Reflection Bypass That Hands Attackers SYSTEM

July 4, 2026

• "Bad Epoll" (CVE-2026-46242) gives local users root on Linux 6.4+ and newer Android. The kernel flaw sits in the same stretch of code where Anthropic's Mythos model recently found a different bug; the PoC reached 99% reliability and may be triggerable from the Chrome renderer sandbox. A fix is out. The Hacker News · Vulnerabilities & Exploits

in Silent Active Directory Recon and a Near-Perfect Linux Root Exploit Lead the Offensive Beat

June 24, 2026

• OpenAI expanded its Daybreak initiative with the full GPT-5.5-Cyber model, an updated Codex Security plugin, and a 25+ partner network, claiming it outperforms Anthropic's Mythos on a cybersecurity benchmark and shifting focus from finding to auto-patching vulnerabilities. The Decoder. · AI & Model Security

in Two Netlogon Flaws Hit Domain Controllers as FortiBleed Lands in Finland

June 23, 2026

• Anthropic's feud with the US government escalates — MIT Technology Review unpacks the dispute around Anthropic's Mythos model and what to watch as government pressure on AI capabilities grows. MIT Tech Review · Industry & Policy

in Five Eyes Warns Frontier AI Will Reshape Offensive Cyber Ops as a New Entra ID Conditional Access Bypass Surfaces