Regex Bypass to SQLi

🎯 One character. One flag. Can you exploit the regex?

Challenge 21 Jan 2026 Pro Exclusive Solution (Pro)

A corporate directory validates user input with a regex pattern and Python's re.MULTILINE flag. The developers are confident their ^[a-z0-9 ]+$ pattern blocks all SQL injection attempts. They don't realize that MULTILINE changes how ^ and $ anchors behave. Security researchers know that a single control character can split validation logic across lines, bypassing even careful regex checks. Exploit this documented vulnerability and demonstrate why regex patterns cannot secure SQL queries.