Cloudflare outage: disruptions to major websites around the world – December 5, 2025

On Friday, December 5, 2025, the internet experienced one of its major disruptions of the year. A massive Cloudflare outage paralyzed numerous global services, triggering the dreaded "500 Internal Server Error" message on thousands of websites. LinkedIn, Notion, DeepL, Zoom, Shopify, and many other platforms became inaccessible for several minutes, affecting millions of users worldwide.

What Happened?

Cloudflare, the American giant specializing in Content Delivery Networks (CDN) and internet infrastructure security, suffered a significant service interruption early in the morning. The company acts as an essential technical intermediary between website servers and internet users. When its systems face difficulties, the repercussions are instantaneous for thousands of client platforms relying on its infrastructure.

The incident was first reported at 8:56 UTC, when Cloudflare acknowledged issues with its Dashboard and associated APIs. Clients using these services were impacted, with requests failing or displaying error messages. Thousands of users reported an identical pattern: websites that usually load instantly suddenly crashed, displaying the infamous 500 error code.

A "500 Internal Server Error" generally indicates that a server is unable to process a request due to a temporary server-side issue. When an infrastructure provider like Cloudflare encounters a disruption, these types of errors appear simultaneously across multiple seemingly unrelated platforms, all dependent on the same underlying infrastructure.

The Link to Scheduled Maintenance

According to initial technical observations, the origin of this incident appears to be linked to a maintenance operation planned by Cloudflare. Before going down completely, Cloudflare's status page displayed messages regarding maintenance scheduled for the morning of December 5. The company had scheduled operations in several data centers, specifically in Detroit (DTW), Chicago (ORD), and Minneapolis (MSP) during morning hours.

This situation recalls a well-known adage in the IT world: even the best-planned maintenance operations can sometimes go wrong. What was supposed to be a simple update or configuration change turned into a global outage affecting a significant portion of worldwide web traffic.

A Global and Diverse Impact

The scope of affected services perfectly illustrates the central position Cloudflare occupies in modern web architecture. The disruptions affected extremely varied sectors, demonstrating how much the global digital economy depends on a few key infrastructure players.