Cloudflare outage on November 18, 2025

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What Happened

  • Cloudflare, a major internet infrastructure provider, experienced a global outage early Tuesday morning.
  • The issue began around 6:00 AM ET and caused widespread HTTP 500 errors, impacting Cloudflare’s Dashboard, API, and services that rely on its network.
  • Popular platforms like X (Twitter), ChatGPT, Spotify, Uber, Canva, League of Legends, and even Downdetector (which tracks outages) were affected. Some government and transit services also reported disruptions. [engadget.com], [pcmag.com], [securityweek.com]


  • Cloudflare confirmed the outage was not a cyberattack.
  • The root cause was a latent bug in its bot mitigation service, triggered by a routine configuration change. This bug cascaded into a broad network degradation, affecting multiple services globally. [pcmag.com], [securityweek.com], [techcrunch.com]
  • Initially, Cloudflare also observed an unusual traffic spike, which contributed to the errors, but the main culprit was the bug. [cnbc.com], [arstechnica.com]


  • Millions of users worldwide faced connectivity issues. Downdetector logged over 2.1 million outage reports globally, with 453,000+ from the U.S. alone. [pcmag.com]
  • Because Cloudflare powers about 20% of all websites, the outage disrupted a huge portion of the internet, including critical services and major brands. [cnet.com], [techstory.in]


  • Cloudflare implemented a fix around 9:50 AM ET, and most services began recovering soon after. However, some users continued to see intermittent errors as systems stabilized. [engadget.com], [economicti...atimes.com]
  • The company promised a full technical postmortem and said measures are underway to prevent similar incidents in the future. [techcrunch.com]


  • This outage highlights the internet’s dependency on a few infrastructure providers like Cloudflare, AWS, and Google Cloud. A single bug can ripple across the web, affecting millions.
  • Cloudflare’s CTO called the incident “unacceptable” and acknowledged the trust customers place in them, pledging improvements. [securityweek.com]

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