GO-2023-1495

Request smuggling due to improper request handling in golang.org/x/net/http2/h2c

At a glance

Published: 2023-01-13
Updated: 2026-08-07
CVE: CVE-2022-41721
Aliases: GHSA-fxg5-wq6x-vr4w

Description

A request smuggling attack is possible when using MaxBytesHandler. When using MaxBytesHandler, the body of an HTTP request is not fully consumed. When the server attempts to read HTTP2 frames from the connection, it will instead be reading the body of the HTTP request, which could be attacker-manipulated to represent arbitrary HTTP2 requests.

Affected packages

Package	Versions
Go · golang.org/x/net	introduced 0.0.0-20220524220425-1d687d428aca, fixed 0.1.1-0.20221104162952-702349b0e862

References

https://go.dev/issue/56352 REPORT
https://go.dev/cl/447396 FIX

Sources

Source	Licence
OSV.dev	CC-BY 4.0 — Go Vulnerability Database