CIO Brief: Leaked Configuration Files Are Leaked Keys

Retrospective: this article looks back at events from August 2024, written in 2026 with the benefit of hindsight.

The short version: In 2024, attackers scanned the internet for websites accidentally publishing their configuration files — which contained cloud passwords and keys. They used those keys to steal and delete company data, then demanded ransom. No hacking skills required.

Why configuration files are dangerous

Applications need passwords and keys to connect to databases and cloud services. Developers often store them in configuration files. If a website is misconfigured, those files can be downloaded by anyone who asks for them — and attackers ask automatically, across millions of websites.

The business impact

• Data theft and deletion leading to extortion.
• Cloud bills from attacker activity.
• No warning, because nothing was technically "broken into."

Questions to ask your team

• Could any of our websites expose configuration files to the internet?
• Do our applications store passwords and keys in files, or in a secure secrets service?
• Do our application keys have only the access they need — or could they create new administrator accounts?
• Can we recover data if it's deleted from cloud storage?

What good looks like

Secrets stored in managed secrets services, applications using cloud roles instead of keys, web servers configured to block configuration files, least-privilege permissions, and versioned, protected backups.

The decision

Ask your team to test your public websites for exposed configuration files this week. It's a quick check with potentially serious findings.