A regression in the fix for bug 66512 in Apache Tomcat 11.0.0, 10.1.8, 9.0.74 and 8.5.88 meant that, if a response did not include any HTTP headers no AJP SENDHEADERS messare woudl be sent for the response which in turn meant that at least one AJP proxy (modproxy_ajp) would use the response headers from the previous request leading to an information leak.
{
"cpes": [
"cpe:2.3:a:apache:tomcat:10.1.8:*:*:*:*:*:*:*",
"cpe:2.3:a:apache:tomcat:11.0.0:milestone5:*:*:*:*:*:*",
"cpe:2.3:a:apache:tomcat:8.5.88:*:*:*:*:*:*:*",
"cpe:2.3:a:apache:tomcat:9.0.74:*:*:*:*:*:*:*",
"cpe:2.3:a:apache:tomcat:*:*:*:*:*:*:*:*"
],
"severity": "High"
}