A flaw was found in Undertow. A regression in the fix for CVE-2020-10687 was found. 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. The highest threat from this vulnerability is to data confidentiality and integrity.
{
"nvd_published_at": "2021-02-23T18:15:00Z",
"severity": "MODERATE",
"github_reviewed_at": "2021-03-31T23:33:57Z",
"github_reviewed": true,
"cwe_ids": [
"CWE-444"
]
}