Websites worldwide back online after yet another Cloudflare outage

Cloudflare is potentially struggling with another outage coming on the heels of a major outage that forced hundreds of millions of people offline.

Live: what's going on with Cloudflare?

12/05/2025, 12:18 PM (UTC+00:00)

Cloudflare CTO speaks out after 40-minute outage

Dane Knecht, Cloudflare's chief technology officer, said that the company is aware of the issues and has found the reason for the outage. The root cause of the outage was caused by the React critical vulnerability. Cloudflare disabled some logging to mitigate the vulnerability, Knecht said in a post on X.

12/05/2025, 10:33 AM (UTC+00:00)

Cloudflare sites and services seem to be operational

10:33 (GMT+1) - Cloudflare's health status page suggests that all of its services are operational and the issues have been resolved.

12/05/2025, 10:05 AM (UTC+00:00)

Huge number of empty pages on Workers KV namespace

10:04 (GMT+1) - Cloudflare has added additional updates, saying that users have reported a large number of empty pages when using the API on the Workers KV namespace.

12/05/2025, 9:36 AM (UTC+00:00)

Cloudflare reveals "workers" issues

9:35 (GMT+1) - Cloudflare has said that users may be experiencing "an increased level of errors" for customers running Workers scripts.

12/05/2025, 9:27 AM (UTC+00:00)

Thousands report issues with Cloudflare

9:25 (GMT+1) - Thousands of people have taken to Downdetector to report issues with Cloudflare. Over 1,700 users in the US have reported issues with many reporting issues with server connection, the website, and domain name server errors.

12/05/2025, 9:22 AM (UTC+00:00)

Cloudflare implents a fix

9:21 (GMT+1) - Cloudflare has supposedly investigated the issue and has implemented a fix. The fix is being monitored by the team, and users, developers, and clients should expect updates shortly.

12/05/2025, 9:20 AM (UTC+00:00)

Downdetector back online

9:19 (GMT+1) - Downdetector, the live reporting platform for outages, seems to be back online following Cloudflare's announcement that they have implemented a fix.

When Downdetector is offline, that’s when you know there’s something wrong with the internet, and there might just be something wrong with Cloudflare, again.

Redditors took to the r/Cloudflare subreddit to say that they suspect Cloudflare is down again, and there’s one telltale sign that there are issues. Downdetector.

The outage reporting platform, Downdetector, is currently offline, returning an “500 Internal Server Error” message, which can only mean one thing. There’s something wrong with the internet.

On Cloudflare’s status page, a warning notice popped up saying that Cloudflare is investigating an issue with Cloudflare Dashboard and related APIs.

This is like deja vu, as just a month prior, Cloudflare experienced a major outage that forced millions of platforms to go down.

Hundreds of millions of people across the globe were unable to access the internet after a technical issue impacted services at Cloudflare. The issue was not related to a cyberattack, and Cloudflare's CEO apologized for the disruptions, saying "we let the internet down today."

Cloudflare outage fixed. What caused the issue?

Cloudflare seems to have fixed the issue which took certain websites offline and returned a 500 server error earlier today.

The outage that lasted roughly 40 minutes affected a range of websites including Downdetector, LinkedIn, and other sites.

Chief Technology Officer at Cloudflare, Dane Knecht, said in a post on X that the issue wasn't a result of a cyberattack.

Instead it was caused by disabling some logging in to help mitigate this weeks React vulnerability.

The critical security flaw was discovered in React, one of the most widely used JavaScript libraries for building websites.

The bug enables external attackers to run privileged, arbitrary code on servers without any authorization.

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