Cloudflare

entries: 40
incidents: 40
shutdowns: 0
years: 2012–2026
Most recent: Cross-request KV cache exposure in the GLM-5.3 Workers AI model, and our remediation with SGLang, 2026-08-27.

When was the most recent Cloudflare incident?

The most recent documented Cloudflare incident on postmortem.io is "Cross-request KV cache exposure in the GLM-5.3 Workers AI model, and our remediation with SGLang", from Aug 27, 2026.

How many Cloudflare incidents are documented on postmortem.io?

postmortem.io has 40 documented Cloudflare incidents, spanning 2012 to 2026.

How many Cloudflare incidents were there in 2026?

5 incidents from Cloudflare are documented for 2026.

What are the most common causes of Cloudflare incidents?

The most frequently tagged themes across Cloudflare's incidents are: outage, config-error, bgp, network.

40 entries from Cloudflare · newest first

2026-08-27Incident
Cross-request KV cache exposure in the GLM-5.3 Workers AI model, and our remediation with SGLang
Cloudflaresecurity-incident, data-exposure, workers-ai +8 more tags
company blog
2026-05-05Incident
When DNSSEC goes wrong: how we responded to the .de TLD outage
Cloudflareoutage, dns, dnssec +3 more tags
company blog
2026-02-20Incident
Cloudflare outage on February 20, 2026
Cloudflareoutage, bgp, byoip +3 more tags
company blog
2026-01-22Incident
Route leak incident on January 22, 2026
Cloudflareoutage, bgp, route-leak +3 more tags
company blog
2026-01-08Incident
What came first: the CNAME or the A record?
Cloudflareoutage, cloudflare, dns +5 more tags
company blog
2025-12-05Incident
Cloudflare outage on December 5, 2025
Cloudflareoutage, waf, config-error +2 more tags
company blog
2025-11-18Incident
Cloudflare outage on November 18, 2025
Cloudflareoutage, config-error, clickhouse +3 more tags
company blog
2025-09-12Incident
A deep dive into Cloudflare's September 12, 2025 dashboard and API outage
Cloudflareoutage, dashboard, api +2 more tags
company blog
2025-08-21Incident
Cloudflare Incident on August 21, 2025
Cloudflareoutage, network, peering +3 more tags
company blog
2025-07-14Incident
Cloudflare 1.1.1.1 incident on July 14, 2025
Cloudflareoutage, dns, 1.1.1.1 +3 more tags
company blog
2025-06-12Incident
Cloudflare service outage June 12, 2025
Cloudflareoutage, workers-kv, third-party-dependency +2 more tags
company blog
2025-03-21Incident
Cloudflare incident on March 21, 2025
Cloudflareoutage, r2, object-storage +2 more tags
company blog
2025-02-06Incident
Cloudflare incident on February 6, 2025
Cloudflareoutage, r2, object-storage +2 more tags
company blog
2024-11-14Incident
Cloudflare Incident on November 14, 2024, Resulting in Lost Logs
Cloudflareoutage, logging, logpush +2 more tags
company blog
2024-06-27Incident
Cloudflare 1.1.1.1 incident on June 27, 2024
Cloudflareoutage, dns, 1.1.1.1 +4 more tags
company blog
2024-06-20Incident
Cloudflare incident on June 20, 2024
Cloudflareoutage, ddos, rate-limiting +3 more tags
company blog
2024-03-26Incident
Major data center power failure (again): Cloudflare Code Orange tested
Cloudflareoutage, data-center, power-failure +3 more tags
company blog
2023-11-23Incident
Thanksgiving 2023 security incident
Cloudflaresecurity-incident, breach, okta +3 more tags
company blog
2023-11-02Incident
Post mortem on the Cloudflare Control Plane and Analytics Outage
Cloudflareoutage, control-plane, data-center +1 more tags
company blog
2023-10-30Incident
Cloudflare incident on October 30, 2023
Cloudflareoutage, workers-kv, deployment-tool
company blog
2023-10-18Incident
How Cloudflare mitigated yet another Okta compromise
Cloudflaresecurity-incident, okta, credential-theft +3 more tags
company blog
2023-10-04Incident
1.1.1.1 lookup failures on October 4, 2023
Cloudflareoutage, config-error, dns +3 more tags
company blog
2023-07-17Incident
Hardening Workers KV
Cloudflareoutage, workers-kv, observability +2 more tags
company blog
2023-01-24Incident
Cloudflare incident on January 24, 2023
Cloudflareoutage, config-error, service-tokens +3 more tags
company blog
2022-10-25Incident
Partial Cloudflare outage on October 25, 2022
Cloudflareoutage, cdn, caching +3 more tags
company blog
2022-06-21Incident
Cloudflare outage on June 21, 2022
Cloudflareoutage, bgp, network +1 more tags
company blog
2022-03-22Incident
Cloudflare's investigation of the January 2022 Okta compromise
Cloudflaresecurity-incident, okta, credential-theft +2 more tags
company blog
2022-02-01Incident
BGP security and confirmation biases
Cloudflareoutage, bgp, route-leak +3 more tags
company blog
2020-11-02Incident
A Byzantine failure in the real world
Cloudflareoutage, api, dashboard +5 more tags
company blog
2020-07-17Incident
Cloudflare outage on July 17, 2020
Cloudflareoutage, backbone, network +1 more tags
company blog
2020-04-15Incident
Cloudflare Dashboard and API Outage on April 15, 2020
Cloudflareoutage, data-center, human-error +3 more tags
company blog
2019-07-02Incident
Details of the Cloudflare outage on July 2, 2019
Cloudflareoutage, waf, cpu-exhaustion +1 more tags
company blog
2019-06-24Incident
How Verizon and a BGP Optimizer Knocked Large Parts of the Internet Offline Today
Cloudflareoutage, bgp, route-leak +4 more tags
company blog
2017-02-18Incident
Incident report on memory leak caused by Cloudflare parser bug
Cloudflaresecurity, memory-leak, parser +3 more tags
company blog
2017-01-01Incident
How and why the leap second affected Cloudflare DNS
Cloudflareoutage, time, leap-second +2 more tags
company blog
2016-06-20Incident
A Post Mortem on this Morning's Incident
Cloudflareoutage, network, transit-provider +2 more tags
company blog
2013-03-03Incident
Today's Outage Post Mortem
Cloudflareoutage, network, router +1 more tags
company blog
2012-09-15Incident
Post Mortem: What Yesterday's Network Outage Looked Like
Cloudflareoutage, ddos, rate-limiting +2 more tags
company blog
2012-05-02Incident
Today's Outage Post Mortem
Cloudflareoutage, bgp, routing +2 more tags
company blog
2012-02-24Incident
Post Mortem: The Ugly, the Bad & the Good
Cloudflareoutage, dns, database +2 more tags
company blog

When was the most recent Cloudflare incident?

How many Cloudflare incidents are documented on postmortem.io?

How many Cloudflare incidents were there in 2026?

What are the most common causes of Cloudflare incidents?

No entries in this list