RegEx for including alphanumeric and special characters

In your character class the )-' is interpreted as a range in the same way as e.g. a-z, it therefore refers to any character with a decimal ASCII code from 41 ) to 96 '.

Since _ has code 95, it is within the range and therefore allowed, as are <, =, > etc.

To avoid this you can either escape the -, i.e. \-, or put the - at either the start or end of the character class:

/^[a-zA-Z0-9!@#$&()`.+,/"-]*$/

There is no need to escape the ", and note that because you are using the * quantifier, an empty string will also pass the test.

Using this regex you allow all alphanumeric and special characters. Here \w is allowing all digits and \s allowing space

[><?@+'`~^%&\*\[\]\{\}.!#|\\\"$';,:;=/\(\),\-\w\s+]*

The allowed special characters are ! @ # $ & ( ) - ‘ . / + , “ = { } [ ] ? / \ |

You need to escape the hyphen:

"^[a-zA-Z0-9!@#$&()\\-`.+,/\"]*$"

If you don't escape it then it means a range of characters, like a-z.