CVE-2022-24766

mitmproxy is an interactive, SSL/TLS-capable intercepting proxy. In
mitmproxy 7.0.4 and below, a malicious client or server is able to perform
HTTP request smuggling attacks through mitmproxy. This means that a
malicious client/server could smuggle a request/response through mitmproxy
as part of another request/response’s HTTP message body. While mitmproxy
would only see one request, the target server would see multiple requests.
A smuggled request is still captured as part of another request’s body, but
it does not appear in the request list and does not go through the usual
mitmproxy event hooks, where users may have implemented custom access
control checks or input sanitization. Unless mitmproxy is used to protect
an HTTP/1 service, no action is required. The vulnerability has been fixed
in mitmproxy 8.0.0 and above. There are currently no known workarounds.