[jboss-jira] [JBoss JIRA] (WFLY-9724) Undertow does not allow UTF-8 characters in URLs

Undertow does not allow UTF-8 characters in URLs ------------------------------------------------ Key: WFLY-9724 URL: https://issues.jboss.org/browse/WFLY-9724 Project: WildFly Issue Type: Bug Components: Web (Undertow) Reporter: Stuart Douglas Assignee: Stuart Douglas Labels: downstream_dependency, qe-pre-ack We receive a 400 response code if using UTF-8 characters for a request, due to this check: https://github.com/undertow-io/undertow/blob/master/core/src/main/java/io... This was introduced in UNDERTOW-1101. We want to understand why it is necessary for the CVE/CWE regarding request smuggling, but this ticket is to at least make this check optional as it goes against the URL_ENCODING UndertowOption when set to UTF-8 (default).