Cloudflare outage 2019: how one regex caused 27 minutes of 502s

DEV Community·1 points·axrisi·2 days ago·dev.to

The Cloudflare outage of July 2, 2019: one WAF regex with catastrophic backtracking pushed every CPU to 100% and dropped 82% of traffic for 27 minutes.

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#cloudflare #regex #outage #cloudflare outage #caused #502s #regex caused #one regex

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