It was discovered that Undertow before 1.4.17, 1.3.31 and 2.0.0 processes http request headers with unusual whitespaces which can cause possible http request smuggling.
{ "nvd_published_at": "2018-07-27T15:29:00Z", "cwe_ids": [ "CWE-444" ], "severity": "HIGH", "github_reviewed": true, "github_reviewed_at": "2022-11-08T12:39:25Z" }