[
https://issues.apache.org/jira/browse/VALIDATOR-442?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=18069960#comment-18069960
]
Rafał Figas commented on VALIDATOR-442:
---------------------------------------
Accordingly to [[RFC
5892|[https://datatracker.ietf.org/doc/html/rfc5892|https://datatracker.ietf.org/doc/html/rfc5892)]]]
in [[Appendix
B.1|[https://datatracker.ietf.org/doc/html/rfc5892#appendix-B.1]]] those
characters (among many others) are not allowed to be used in domain names
(especially because of phishing risks):
!image-2026-03-31-17-20-01-002.png!
> EmailValidator and zero-width space
> -----------------------------------
>
> Key: VALIDATOR-442
> URL: https://issues.apache.org/jira/browse/VALIDATOR-442
> Project: Commons Validator
> Issue Type: Bug
> Affects Versions: 1.6
> Reporter: Alessandro Cataldo
> Priority: Minor
> Attachments: image-2026-03-31-17-20-01-002.png
>
>
> EmailValidator does not take into account category "Cf" in the Unicode
> specification.
> String test = "[email protected]*\u200b*"; //Unicode zero-width space
> boolean valid = EmailValidator.getInstance().isValid(test);
> System.out.println("Is valid: "+valid);
> //Returns true
--
This message was sent by Atlassian Jira
(v8.20.10#820010)
