Cloudflare Outage Incident
- Ranjith Manne
- Nov 21, 2025
- 2 min read
Updated: Jan 27
On November 18, 2025, Cloudflare, a company that offers tools to improve website performance and protect against cyberattacks, experienced a major global outage. This incident caused many popular websites and services to stop working or display error messages, specifically HTTP 500 errors. The issue began around 4:50 PM IST and lasted for about three hours. During this time, users encountered "Internal Server Error" pages when trying to visit sites like X (formerly Twitter), ChatGPT, Canva, and Spotify. Cloudflare's own status dashboard was also down.
How It Happened
The outage was not caused by a cyberattack. Instead, it stemmed from an internal software error triggered by a routine update.
The Root Cause
Cloudflare's Bot Management system, which stops spam bots, uses a specific configuration file to determine what to block.
The Trigger
A change to one of the database system's permissions caused this configuration file to be generated incorrectly. Instead of its normal size, the file doubled in size because it contained multiple entries.
The Crash
When this oversized file was sent out to Cloudflare's servers, the software that handles internet traffic couldn't process it. It treated the file size as a violation of its safety rules and crashed, blocking legitimate traffic along with it.
What Is the Impact?
The impact was massive because Cloudflare acts as a "middleman" for millions of websites. When Cloudflare "jammed," all the sites behind it became inaccessible.
Affected Services
Major platforms, including OpenAI (ChatGPT), X, Canva, Discord, Spotify, and many customers of Cloudflare, were affected.
User Experience
Millions of users worldwide could not log in, work, or access tools during the outage.
Cloudflare Internal
Cloudflare's own tools, including the Dashboard and API, went down. This made it harder for their engineers to communicate the status to customers immediately.
What Steps Were Taken to Fix This?
Cloudflare engineers acted quickly once they identified the source of the crash.
Identification
They realized the "Bot Management" configuration file was the culprit.
Stop the Bleeding
They halted the system from sending out any new faulty files.
Rollback
They manually reverted (rolled back) the configuration to a "last known good" version—an older file that was the correct size.
Recovery
Once the correct file was in place, the software stopped crashing, and traffic began flowing normally again by 8:00 PM IST.
Conclusion
This incident highlights the importance of robust internal systems and the need for constant vigilance in cybersecurity. As businesses increasingly rely on digital platforms, understanding the implications of such outages becomes crucial.
For more information on Cloudflare's outage and its implications, you can visit Cloudflare's official blog.
Additional Resources
To further understand the intricacies of bot management and how it affects website performance, consider exploring the following resources:
In conclusion, the Cloudflare outage serves as a reminder of the vulnerabilities that can affect even the most established digital service providers. By staying informed and prepared, businesses can better navigate the complexities of cybersecurity and ensure their digital assets remain secure.
