React Flaw Mitigation Leads to Cloudflare Outage

Outage Briefly Took Down Zoom, LinkedIn and Other Websites Akshaya Asokan (asokan_akshaya) • December 5, 2025

Content delivery network giant Cloudflare is investigating a brief outage early Friday that took down multiple websites. The incident marks the second outage in the span of a month, although the company said the causes are unrelated.

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The incident affected social media platforms LinkedIn and X as well as Zoom and online design platform Canva. Multiple users took to X on Friday morning to report that they were prompted with an internal server error when they visited these websites. Impacted services have since been restored.

A Cloudflare spokesperson said the issue was first detected at approximately 8:47 GMT and stemmed from how Cloudflare's web application firewall parses requests, impacting network availability.

"This was not an attack; the change was ...