Ship features safely with feature flags. Flagship is Cloudflare’s feature flag service. It lets you control feature visibility in your applications without redeploying code. Define flags with targeting rules and percentage-based rollouts, then evaluate them directly inside your Workers through … Read more
On April 29, 2026, a Linux kernel local privilege escalation vulnerability was publicly disclosed under the name “Copy Fail” (CVE-2026-31431). Cloudflare’s Security and Engineering teams began assessing the vulnerability as soon as it was disclosed. We reviewed the exploit technique, … Read more
Email is the most accessible interface in the world. It is ubiquitous. There’s no need for a custom chat application, no custom SDK for each channel. Everyone already has an email address, which means everyone can already interact with your … Read more
Cloudflare is accelerating its post-quantum roadmap. We now target 2029 to be fully post-quantum (PQ) secure including, crucially, post-quantum authentication. At Cloudflare, we believe in making the Internet private and secure by default. We started by offering free universal SSL … Read more
Before jumping into this article please take a look at the following Cloudflare ruleset and think for a while what is wrong with it? I set up above rules and thought they would work like the following: From the first … Read more
# Initiate a crawlcurl -X POST ‘https://api.cloudflare.com/client/v4/accounts/{account_id}/browser-rendering/crawl’ -H ‘Authorization: Bearer ‘ -H ‘Content-Type: application/json’ “url”: “https://blog.cloudflare.com/”# Check resultscurl -X GET ‘https://api.cloudflare.com/client/v4/accounts/{account_id}/browser-rendering/crawl/{job_id}’ -H ‘Authorization: Bearer ‘
On February 20, 2026, at 17:48 UTC, Cloudflare experienced a service outage when a subset of customers who use Cloudflare’s Bring Your Own IP (BYOIP) service saw their routes to the Internet withdrawn via Border Gateway Protocol (BGP). The issue … Read more
On December 5, 2025, at 08:47 UTC (all times in this blog are UTC), a portion of Cloudflare’s network began experiencing significant failures. The incident was resolved at 09:12 (~25 minutes total impact), when all services were fully restored. A … Read more
“Like Zendesk, innovation is in Cloudflare’s DNA — it mirrors our beautifully simple development ethos with the connectivity cloud, a powerful, yet simple-to-implement, end-to-end solution that does all the heavy lifting, so we don’t need to.” Nan Guo Senior Vice … Read more
JoeWiltshire 22 minutes ago | next [–] https://downdetectorsdowndetectorsdowndetectorsdowndetector…. reports that https://downdetectorsdowndetectorsdowndetector.com/ is down, guessing downdetectorsdowndetectorsdowndetector runs via cloudflare! designerarvid 17 minutes ago | parent | next [–] https://youtu.be/CIpbEa6KTNI?si=tgEaPo8xG7KnpxLt&t=564 yellowbanana 21 minutes ago | parent | prev | next [–] This … Read more