aaugustin websockets version 4 contains a CWE-409: Improper Handling of Highly Compressed Data (Data Amplification) vulnerability in Servers and clients, unless configured with compression=None that can result in Denial of Service by memory exhaustion. This attack appear to be exploitable via Sending a specially crafted frame on an established connection. This vulnerability appears to have been fixed in 5.
{
"cpe": "cpe:2.3:a:websockets_project:websockets:4.0:*:*:*:*:python:*:*",
"extracted_events": [
{
"introduced": "0"
},
{
"last_affected": "4.0"
}
],
"source": "CPE_FIELD"
}