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CVE-2022-32148

Published: Aug 9, 2022

Modified: Mar 6, 2026

PUBLISHED

Description

Improper exposure of client IP addresses in net/http before Go 1.17.12 and Go 1.18.4 can be triggered by calling httputil.ReverseProxy.ServeHTTP with a Request.Header map containing a nil value for the X-Forwarded-For header, which causes ReverseProxy to set the client IP as the value of the X-Forwarded-For header.

Vendor	Product	Versions
Go standard library	net/http	affected `0 - < 1.17.12` affected `1.18.0-0 - < 1.18.4`

References

https://go.dev/cl/412857

https://go.googlesource.com/go/+/b2cc0fecc2ccd80e6d5d16542cc684f97b3a9c8a

https://go.dev/issue/53423

https://groups.google.com/g/golang-announce/c/nqrv9fbR0zE

https://pkg.go.dev/vuln/GO-2022-0520

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