If an HTTP/2 client connecting to Apache Tomcat 10.0.0-M1 to 10.0.0-M7, 9.0.0.M1 to 9.0.37 or 8.5.0 to 8.5.57 exceeded the agreed maximum number of concurrent streams for a connection (in violation of the HTTP/2 protocol), it was possible that a subsequent request made on that connection could contain HTTP headers - including HTTP/2 pseudo headers - from a previous request rather than the intended headers. This could lead to users seeing responses for unexpected resources.
{
"github_reviewed": true,
"cwe_ids": [
"CWE-200"
],
"github_reviewed_at": "2021-04-12T18:12:07Z",
"nvd_published_at": "2020-10-12T14:15:00Z",
"severity": "MODERATE"
}