WHEN REGEX GOES WRONG

Summary from the TLDR Web Dev newsletter

In 2016, Stack Overflow suffered a 34-minute outage due to a regex that caused catastrophic backtracking when processing a malformed input string. In 2019, Cloudflare experienced a global outage due to a regex that led to CPU exhaustion. More recently, CrowdStrike faced a kernel issue caused by a regex mismatch.