Vulnerability disclosure volume jumped sharply around a frontier model's release. Engineers should expect heavier patch workloads and faster vulnerability discovery. Epoch shows the timing, not proven causation.
Key takeaways · AI-distilled
Epoch’s July 2026 analysis reports a sharp rise in high- and critical-severity CVE disclosures after April’s Mythos Preview announcement; its series covers 21 selected organizations.
The analysis uses publicly disclosed CVE.org reports and excludes vulnerabilities discovered but not yet disclosed; Anthropic’s larger Glasswing discovery count is a separate company claim.
Epoch cautions that increased interest in finding bugs may contribute to the disclosure spike alongside greater feasibility of discovery, so the increase should not be read as solely a model-capability effect.
