The HTTP/2 protocol allows a denial of service (server resource consumption) because request cancellation can reset many streams quickly, as exploited in the wild in August through October 2023.
{
"severity": "High",
"cpes": [
"cpe:2.3:a:varnish_cache_project:varnish_cache:*:*:*:*:*:*:*:*"
]
}