Partial Cloudflare outage on October 25, 2022
October 26, 2022 4:02AM
Today, a change to our Tiered Cache system caused some requests to fail for users with status code 530...
The mechanics of a sophisticated phishing scam and how we stopped it
August 09, 2022 4:56PM
Security Post Mortem Phishing Cloudflare Gateway Cloudflare AccessYesterday, 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...
Cloudflare outage on June 21, 2022
June 21, 2022 1:38PM
Outage Post MortemToday, June 21, 2022, Cloudflare suffered an outage that affected traffic in 19 of our data centers...
PIPEFAIL: How a missing shell option slowed Cloudflare down
April 05, 2022 1:57PM
Post Mortem Outage Deep Dive Speed & ReliabilityThis post tells the story of how a missing shell option called “pipefail” slowed Cloudflare down....
Cloudflare’s investigation of the January 2022 Okta compromise
March 22, 2022 4:57PM
Okta Security Post MortemToday at 03:30 UTC we learnt of a compromise of Okta. We use Okta internally for employee identity as part of our authentication stack. We have investigated this compromise carefully and do not believe we have been compromised as a result...
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January 26, 2022 6:34PM
Incorrect proxying of 24 hostnames on January 24, 2022
On January 24, 2022, as a result of an internal product migration, 24 hostnames (including www.cloudflare.com) that were actively proxied through the Cloudflare global network were mistakenly redirected to the wrong origin...
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