Vercel Data Breach 2026: ShinyHunters Steals API Keys and Internal Data via Third-Party AI Tool

Vercel — the platform powering deployments for millions of developers worldwide — confirmed a high-severity security incident in April 2026. The attack, attributed to the notorious threat group ShinyHunters, didn’t come through Vercel’s own systems directly. It came through a side door: a third-party AI tool trusted by one of its employees. According to research, over 60% of data breaches now involve a third-party vendor — and this incident is a textbook example of why that statistic keeps climbing.