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August 08, 2025 1:00 PM
Redesigning Workers KV for increased availability and faster performance
Workers KV is Cloudflare's global key-value store. After the incident on June 12, we re-architected KV’s redundant storage backend, remove single points of failure, and make substantial improvements.
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June 12, 2025 10:00 PM
Cloudflare service outage June 12, 2025
Multiple Cloudflare services, including Workers KV, Access, WARP and the Cloudflare dashboard, experienced an outage for up to 2 hours and 28 minutes on June 12, 2025....
March 25, 2025 1:40 AM
Cloudflare incident on March 21, 2025
On March 21, 2025, multiple Cloudflare services, including R2 object storage experienced an elevated rate of error responses. Here’s what caused the incident, the impact, and how we are making sure it...
February 07, 2025 12:00 AM
Cloudflare incident on February 6, 2025
On Thursday, February 6, 2025, we experienced an outage with our object storage service (R2) and products that rely on it. Here's what happened and what we're doing to fix this going forward....
June 26, 2024 1:00 PM
Cloudflare incident on June 20, 2024
A new DDoS rule resulted in an increase in error responses and latency for Cloudflare customers. Here’s how it went wrong, and what we’ve learned...
April 08, 2024 1:00 PM
Major data center power failure (again): Cloudflare Code Orange tested
Just four months after a complete power outage at a critical data center we were hit with the exact same scenario. Here’s how we did this time, and what’s next...
November 04, 2023 6:18 AM
Post mortem on the Cloudflare Control Plane and Analytics Outage
Beginning on Thursday, November 2, 2023, at 11:43 UTC Cloudflare's control plane and analytics services experienced an outage. Here are the details...
November 01, 2023 4:39 PM
Cloudflare incident on October 30, 2023
Multiple Cloudflare services were unavailable for 37 minutes on October 30, 2023, due to the misconfiguration of a deployment tool used by Workers KV....
October 20, 2023 9:39 PM
How Cloudflare mitigated yet another Okta compromise
On Wednesday, October 18, 2023, we discovered attacks on our system that we were able to trace back to Okta. We have verified that no Cloudflare customer information or systems were impacted by this event because of our rapid response. ...
October 04, 2023 7:40 PM
1.1.1.1 lookup failures on October 4, 2023
On 4 October 2023, Cloudflare experienced DNS resolution problems. Some users may have received SERVFAIL DNS responses to valid queries. In this blog, we’re going to talk about what the failure was, why it occurred, and what we’re doing to make sure this doesn’t happen again...
August 02, 2023 1:05 PM
Hardening Workers KV
A deep dive into the recent incidents relating to Workers KV, and how we’re going to fix them...
July 11, 2023 8:48 AM
Connection errors in Asia Pacific region on July 9, 2023
On July 9, 2023, users in the Asia Pacific region experienced connection errors due to origin DNS resolution failures to .com and .net TLD nameservers...
January 25, 2023 3:47 AM
Cloudflare incident on January 24, 2023
Several Cloudflare services became unavailable for 121 minutes on January 24th, 2023 due to an error releasing code that manages service tokens. The incident degraded a wide range of Cloudflare products...
October 26, 2022 3:02 AM
Partial Cloudflare outage on October 25, 2022
Today, a change to our Tiered Cache system caused some requests to fail for users with status code 530...
August 09, 2022 3:56 PM
The mechanics of a sophisticated phishing scam and how we stopped it
Yesterday, August 8, 2022, Twilio shared that they’d been compromised by a targeted phishing attack. Around the same time as Twilio was attacked, we saw an attack with very similar characteristics also targeting Cloudflare’s employees...
