Examples of errors detected by the V5626 diagnostic

V5626. OWASP. Possible ReDoS vulnerability. Potentially tainted data is processed by regular expression that contains an unsafe pattern.

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V5626 Possible ReDoS vulnerability. Potentially tainted data from the 'name' variable is processed by regular expression that contains unsafe pattern: '(...sfzgkt]+...)+'. PathHelper.cs 19

public static string ReplaceRegexInName(string name)
{
  const string dateTimeFileNameRegEx = @"[?]([ymdhsfzgkt]+[-_ ]*)+[?]";

  if (!Regex.IsMatch(name, dateTimeFileNameRegEx, RegexOptions.IgnoreCase))
    return name;

  var match = Regex.Match(name, dateTimeFileNameRegEx, RegexOptions.IgnoreCase);
  var date = DateTime.Now.ToString(Regex.Replace(match.Value, "[?]", ""));

  return name.Replace(match.ToString(), date);
}

Similar errors can be found in some other places:

• V5626 Possible ReDoS vulnerability. Potentially tainted data from the 'name' variable is processed by regular expression that contains unsafe pattern: '(...sfzgkt]+...)+'. PathHelper.cs 22