REGEX.

24 production regexes inspected for catastrophic backtracking. 7 have ReDoS exposure under crafted input. 2 used in pre-deploy validation are themselves the bottleneck.

The regex that took 5 minutes to write is taking 5 seconds per request.

RL-014 · email validator · /signup REDOS

Backtracking input freezes for 38s. CVE-style impact: DoS.

Replace with RFC 5322 lite pattern, add input length cap.