Highlights
Regular Expression Injection: 1 prior fix. Scrutinize any change in this area.
library/Respect/Validation/Rules/Alnum.php: most-fixed (1 issue). Treat as high-risk during review.
1 high-severity fix in this history; regressions here are high-impact.
Recurring patterns
The bug types that recur here, drawn from past fixes, not open vulnerabilities.
Regular Expression Injection: Raw additional characters provided to validation rules like Alnum were directly interpolated into a preg_match pattern without sanitization, allowing attackers to inject arbitrary regex modifiers or operators. Developers must avoid dynamic pattern construction and instead use safer character stripping or escaping strategies.