A flaw was discovered in all versions of Undertow before Undertow 2.2.0.Final, where HTTP request smuggling related to CVE-2017-2666 is possible against HTTP/1.x and HTTP/2 due to permitting invalid characters in an HTTP request. This flaw allows an attacker to poison a web-cache, perform an XSS attack, or obtain sensitive information from request other than their own.
{
"nvd_published_at": "2020-09-23T13:15:00Z",
"severity": "MODERATE",
"github_reviewed_at": "2021-04-28T16:14:25Z",
"github_reviewed": true,
"cwe_ids": [
"CWE-444"
]
}