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One Subtle Regex Takes Down Cloudflare

The Downtime Project
The Downtime Project
One Subtle Regex Takes Down Cloudflare
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On July 2, 2019, a subtle issue in a regular expression took down Cloudflare (and with it, a large portion of the internet) for 30 minutes.

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    • Thanks John, and thanks for writing such an exceptional post mortem. It was truly educational and I walked away extremely impressed with your engineering team and processes. You guys have earned the right to be such a key part of the internet’s infrastructure.