### ImpactThe SQL parser contains a regular expression that is vulnerable to [ReDoS](https://owasp.org/www-community/attacks/Regular_expression_Denial_of_Service_-_ReDoS) (Regular Expression Denial of Service). The vulnerability may lead to Denial of Service (DoS).### PatchesThis issues has been fixed in sqlparse 0.4.4.### WorkaroundsNone. ### ReferencesThis issue was discovered and reported by GHSL team member [@erik-krogh (Erik Krogh Kristensen)](https://github.com/erik-krogh).- Commit that introduced the vulnerability: e75e35869473832a1eb67772b1adfee2db11b85a