Kai Uwe Bachmann ( https://hibernate.atlassian.net/secure/ViewProfile.jspa?accountId=5f98104... ) *created* an issue Hibernate Validator ( https://hibernate.atlassian.net/browse/HV?atlOrigin=eyJpIjoiOWM1NGVlOTllZ... ) / Bug ( https://hibernate.atlassian.net/browse/HV-1952?atlOrigin=eyJpIjoiOWM1NGVl... ) HV-1952 ( https://hibernate.atlassian.net/browse/HV-1952?atlOrigin=eyJpIjoiOWM1NGVl... ) AbstractEmailValidator allows umlauts within local part of an email address ( https://hibernate.atlassian.net/browse/HV-1952?atlOrigin=eyJpIjoiOWM1NGVl... ) Issue Type: Bug Affects Versions: 7.0.5.Final, 8.0.0.Final Assignee: Unassigned Components: validators Created: 01/Jun/2023 00:27 AM Priority: Major Reporter: Kai Uwe Bachmann ( https://hibernate.atlassian.net/secure/ViewProfile.jspa?accountId=5f98104... ) The Email validator allows umlauts within the local part. As of RFC-2822 the local part consists of dot-atom which starts with atext. In atext there are no umlauts allowed, only ALPHA, DIGIT and some special characters. ALPHA is defined in RFC-2230 as ALPHA = %x41-5A / %x61-7A so an email address ürsula(a)test.xy will be validated as valid but it shouldn’t ( https://hibernate.atlassian.net/browse/HV-1952#add-comment?atlOrigin=eyJp... ) Add Comment ( https://hibernate.atlassian.net/browse/HV-1952#add-comment?atlOrigin=eyJp... ) Get Jira notifications on your phone! Download the Jira Cloud app for Android ( https://play.google.com/store/apps/details?id=com.atlassian.android.jira.... ) or iOS ( https://itunes.apple.com/app/apple-store/id1006972087?pt=696495&ct=Em... ) This message was sent by Atlassian Jira (v1001.0.0-SNAPSHOT#100225- sha1:40c4da4 )