Vercel released deepsec — an AI scanner for finding hidden vulnerabilities in code

Vercel released deepsec, an AI scanner for finding vulnerabilities in large codebases. It uses Claude Opus and GPT-5.5 for analysis, runs locally without cloud services or sending code to the cloud, and can scale through Vercel Sandboxes to run 1,000+ scans in parallel. On real projects (dub.co and Vercel's own monorepos), it found hidden edge cases in auth logic that standard SAST tools miss.