In Undertow before versions 7.1.2.CR1, 7.1.2.GA it was found that the fix for CVE-2016-4993 was incomplete and Undertow web server is vulnerable to the injection of arbitrary HTTP headers, and also response splitting, due to insufficient sanitization and validation of user input before the input is used as part of an HTTP header value.
access.redhat.com/errata/RHSA-2018:1247
access.redhat.com/errata/RHSA-2018:1248
access.redhat.com/errata/RHSA-2018:1249
access.redhat.com/errata/RHSA-2018:1251
access.redhat.com/errata/RHSA-2018:2643
access.redhat.com/errata/RHSA-2019:0877
bugzilla.redhat.com/show_bug.cgi?id=CVE-2018-1067
nvd.nist.gov/vuln/detail/CVE-2018-1067