Security vulnerability reports jumped to about 1,500 high-severity and critical vulnerabilities in June 2026—more than 3.5 times the previous monthly record—following the release of Anthropic's Claude Mythos Preview, an AI model that can autonomously find software bugs. Anthropic's Glasswing program has already uncovered more than 10,000 such vulnerabilities, signaling a shift toward AI-driven security discovery that is flooding the vulnerability disclosure pipeline.
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In June 2026, organizations reported about 1,500 high-severity and critical vulnerabilities (CVEs), more than 3.5 times the previous monthly record. The spike began in April 2026, aligned with Anthropic's announcement that its Claude Mythos Preview model can find software vulnerabilities on its own.
Why it matters
AI models are now discovering security flaws at scale. Anthropic's Glasswing program has uncovered more than 10,000 high-severity or critical vulnerabilities, and OpenAI's Daybreak program is also contributing to the surge. For organizations, this means more vulnerabilities are being surfaced and reported — both a risk exposure and an opportunity to patch systems before threats materialize.
What to watch
The article documents the spike through June 2026 via Epoch AI's tracking. The trend reflects a fundamental shift: AI-driven discovery is outpacing human-only vulnerability hunting, and the volume of reported CVEs may continue to climb as more trusted partners use these tools.
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