On April 19, 2026, Vercel confirmed hackers broke into internal systems — including developer tools like GitHub and Linear. No customer passwords were taken. But environment variables were exposed, meaning attackers could have poked around in your application’s backend without ever touching your servers.
That should concern you.
You’re only as safe as your weakest vendor
Vercel isn’t some obscure tool. It’s a major platform used by thousands of companies to host websites and applications. If they get compromised, your data can leak through no fault of your own.
This isn’t new. McGraw-Hill, OneDigital, Rockstar Games — all breached through a third party this year alone. The pattern is consistent: attackers find the weakest link in your supply chain, not you directly.
For SMBs, this is especially dangerous. You might have locked down your own systems tight, but if your CRM, your cloud host, or your project management tool gets sloppy, you’re exposed.
What you can actually do
Audit your access. Every third-party tool that connects to your systems is a potential entry point. Who has API keys? Who has read/write permissions to your data? If you can’t answer quickly, that’s your starting point.
Apply the principle of least privilege. Vendors don’t need full access to everything forever. Scope permissions to what they actually need, and revoke when the integration ends.
Monitor, don’t just react. If something unusual happens inside a connected tool — strange logins, unexpected data exports — you need to know. Your IT partner should have visibility across your environment, not just your perimeter.
Have an incident response plan that includes vendors. Most businesses know what to do if their server gets hit. Fewer have a clear playbook for “your payroll vendor just got breached.”
The real question
When was the last time you audited who has access to your business data — and what they’d expose if they got compromised?
If you’re not sure, that’s a conversation worth having.
NSI Tech helps businesses lock down their attack surface — including the parts you don’t control. Talk to us about a security review for your environment.