HTTP Request Smuggling
Affecting io.netty:netty-codec-http2 artifact, versions [,4.1.61.Final)Report new vulnerabilities
io.netty:netty-codec-http2 is a HTTP2 sub package for the netty library, an event-driven asynchronous network application framework.
Affected versions of this package are vulnerable to HTTP Request Smuggling. The content-length header is not correctly validated if the request only uses a single
Http2HeaderFrame with the
endStream set to
true. This could lead to request smuggling if the request is proxied to a remote peer and translated to
This is a follow-up of CVE-2021-21295 which did not fix this specific case.
io.netty:netty-codec-http2 to version 4.1.61.Final or higher.