Technology & Science

Cloudflare’s 18 Nov 2025 Global Network Outage Disrupts One-Fifth of the Web

A latent bug triggered a three-hour, worldwide Cloudflare failure on 18 Nov 2025, temporarily cutting off traffic for thousands of sites until engineers rolled back a configuration and restored service mid-day UTC.

By Priya Castellano

Focusing Facts

  1. Spike in unusual traffic at 06:20 a.m. EST crashed Cloudflare’s bot-mitigation service, propagating 500 errors through Access, WARP and API layers.
  2. Dashboard access was restored at 9:34 a.m. EST after the company disabled a TLS encryption module in its London PoP during remediation.
  3. Cloudflare’s platform fronts roughly 300,000 customers and ~20 % of the world’s websites, causing its shares to drop about 4-5 % in pre-market trading.

See how 3 sources reported this story.

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Perspectives in this article

  • Business & investor focused media
  • Tech outlets relaying Cloudflare’s statements
  • Social-media–centric popular news sites
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