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Widespread Cloudflare Outage - 18th November 2025

Last Updated: Wed Nov 19 00:59 2025 UTC

Latest Update:

Wed Nov 19 00:59 2025 UTC:

Cloudflare have provided the following update to us:
"Beginning around 11:20 UTC today, Cloudflare experienced widespread degradation to traffic in our network. We deeply apologize for this disruption. We have published a blog detailing exactly what happened. The majority of the impact was resolved by 14:30 UTC, with all remaining downstream impacted services being fully operational at 17:06 UTC.

In short, this incident occurred due to a latent bug related to a configuration file for our bot management service. There is no evidence of an attack or malicious activity causing the issue.

Bot management detection sits in the critical path for traffic flow. When any request hits our network, the bot management module should load, but due to the bug, the configuration file grew beyond an expected size of entries. This triggered a crash in the software system that handles traffic for a number of Cloudflare's services. Customers experienced HTTP 500 status code errors as many of Cloudflare's services suffered an outage.

The Cloudflare team diagnosed the issue and reverted to an earlier version of the bot detection module configuration that was below the limits. We also modified the core proxy service so it would not fail in this way if limits are reached again.

For a more detailed description and timeline of the incident, and the steps we took to address it, please review our blog."

Previous Updates:

Tue Nov 18 19:30 2025 UTC:

Cloudflare report that this incident has now been resolved. For all previous updates from Cloudflare on this issue, please see: https://www.cloudflarestatus.com/incidents/8gmgl950y3h7.

Tue Nov 18 17:00 2025 UTC:

Cloudflare report "We continue to see errors drop as we work through services globally and clearing remaining errors and latency." - For all previous updates from Cloudflare on this issue, please see: https://www.cloudflarestatus.com/incidents/8gmgl950y3h7.

Tue Nov 18 16:30 2025 UTC:

Cloudflare comment "We continue to see errors and latency improve but still have reports of intermittent errors. The team continues to monitor the situation as it improves, and looking for ways to accelerate full recovery" - For updates, please see: https://www.cloudflarestatus.com/incidents/8gmgl950y3h7.

Tue Nov 18 15:40 2025 UTC:

Cloudflare comment "The team is continuing to focus on restoring service post-fix. We are mitigating several issues that remain post-deployment." - For updates, please see: https://www.cloudflarestatus.com/incidents/8gmgl950y3h7.

Tue Nov 18 14:48 2025 UTC:

Cloudflare report "A fix has been implemented and we believe the incident is now resolved. We are continuing to monitor for errors to ensure all services are back to normal." - see: https://www.cloudflarestatus.com/incidents/8gmgl950y3h7.

Tue Nov 18 14:35 2025 UTC:

More news coverage of the ongoing global Cloudflare outage:

Tue Nov 18 14:00 2025 UTC:

Cloudflare report "We are continuing working on restoring service for application services customers" - see: https://www.cloudflarestatus.com/incidents/8gmgl950y3h7.

Tue Nov 18 13:10 2025 UTC:

Cloudflare report "The issue has been identified and a fix is being implemented" - see: https://www.cloudflarestatus.com/incidents/8gmgl950y3h7.

Tue Nov 18 12:45 2025 UTC:

A number of news outlets are now reporting on the widespread Cloudflare issues, including:

Tue Nov 18 12:25 2025 UTC:

Cloudflare have confirmed that they are currently suffering a significant global outage - More information may be found on Cloudflare's own service status page at: https://www.cloudflarestatus.com/incidents/8gmgl950y3h7

Tue Nov 18 12:15 2025 UTC:

We are aware of an elevated rate of Cloudflare 500 errors being observed by our customers. We are currently investigating and will provide a further update shortly.

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