Claude expands vetted cyber access after Glasswing finds 129,000 flaws

Anthropic is pairing more flexible Claude cyber safeguards with restricted access for vetted security teams, rather than opening the capability broadly. Project Glasswing reportedly verified at least 129,000 software vulnerabilities from April through July 2026, giving the access change a concrete security-testing rationale. For engineering leaders, the development points to controlled, eligibility-based use of advanced models for vulnerability research—not a general-purpose relaxation of safeguards.

• Anthropic expanded a program allowing vetted cybersecurity professionals to test advanced Claude models with reduced safeguards and blocking classifiers.
• Project Glasswing identified at least 129,000 verified software vulnerabilities between April and July 2026.
• Access remains limited: Claude’s cyber safeguards are becoming more flexible for approved teams, but not for everyone.

Bottom line Security leaders should evaluate Claude’s controlled cyber-access model for authorized vulnerability research, while keeping model access and testing boundaries explicit.