One employee at Vercel adopted an AI tool. One employee at that AI vendor got hit with an infostealer. That combination created a walk-in path to Vercel’s production environments through an OAuth grant that nobody had reviewed. Vercel, the cloud platform behind Next.js and its millions of weekly npm downloads, confirmed on Sunday that attackers gained unauthorized access to internal systems. Mandiant was brought in. Law enforcement was notified. Investigations remain active. An update on Monday confirmed that Vercel collaborated with GitHub, Microsoft, npm, and Socket to verify that no Vercel npm packages were compromised. Vercel also announced it is now defaulting environment variable creation to “sensitive.” Next.js, Turbopack, AI SDK, and all Vercel-published npm packages remain uncompromised after a coordinated audit with GitHub, Microsoft, npm, and Socket. Context.ai was the entry point. OX Security’s analysis found that a Vercel employee installed the Context.ai browser extension and signed into it using a corporate Google Workspace account, granting broad OAuth permissions. When Context.ai was breached, the attacker inherited that employee’s Workspace access, pivoted into Vercel environments, …