New serious vulnerabilities spiked around release of Claude Mythos Preview
Summary
Epoch AI reports a notable spike in high- and critical-severity CVEs in June 2026, linked to Anthropic's Claude Mythos Preview and its autonomous vulnerability discovery capabilities. The piece cites Project Glasswing collaborations with major tech firms and OpenAI's Daybreak efforts, noting disclosures from 21 notable organizations and a monthly CVE surge roughly 3.5x above previous records. Data is drawn from CVE.org and Epoch AI’s data hub, underscoring security risks and the evolving role of AI in vulnerability discovery.