Anthropic launches OSS Scanner, an opt-in vulnerability discovery service for open-source software

Anthropic launched OSS Scanner, an opt-in vulnerability scanning service for the open-source ecosystem, in which its strongest model periodically performs security scans for enrolled projects free of charge. Over the past six months, Anthropic used its latest model to scan important software projects and found more than 29,000 candidate vulnerabilities, but only about 6,000 were manually reviewed; at maintainers' request, nearly 5,000 reports that had not been manually verified were sent directly. The service's output is entirely model-generated, with no manual review or triage, so reports may be inaccurate. Anthropic asked expert penetration testers to verify 97 severe and high-severity vulnerabilities across 48 projects; 85 of them (88%) met its coordinated vulnerability disclosure process standards, 11 of 12 were duplicate findings, and only 1 was a false positive. Each report includes a reproducible example, a vulnerability description, and a candidate patch.