---
id: GHSA-7cgw-qmxx-7fc2
title: >-
  Duplicate Advisory: chi: Client IP spoofing in ClientIPFromXFF via
  X-Forwarded-For
summary: >-
  Duplicate Advisory: chi: Client IP spoofing in ClientIPFromXFF via
  X-Forwarded-For
severity: medium
cvss: 4.8
cwe:
  - CWE-348
vendor: go-chi
product: github.com/go-chi/chi/v5
ecosystem: go
affected:
  - github.com/go-chi/chi/v5 <= 5.3.2
published: '2026-10-21'
updated: '2026-10-23'
sourceUpdated: '2026-10-23T20:56:30Z'
source: GHSA
sourceUrl: 'https://github.com/advisories/GHSA-7cgw-qmxx-7fc2'
references:
  - url: 'https://github.com/go-chi/chi/security/advisories/GHSA-j6qf-3m9c-vwj3'
  - url: 'https://nvd.nist.gov/vuln/detail/CVE-2026-114437'
  - url: 'https://www.tenable.com/security/research/tra-2026-66'
  - url: 'https://github.com/advisories/GHSA-7cgw-qmxx-7fc2'
tags:
  - ghsa
  - go
ingestedAt: '2026-10-23T21:38:13.038Z'
---

## Overview

## Duplicate Advisory

This advisory has been withdrawn because it is a duplicate of GHSA-j6qf-3m9c-vwj3. This link is maintained to preserve external references.

## Original Description
In the Golang Chi web framework, the ClientIPFromXFF middleware skips any X-Forwarded-For entry in a configured trusted CIDR but never verifies that the direct TCP peer in http.Request.RemoteAddr belongs to that CIDR. A client that can reach the Go server directly can therefore append a trusted-looking proxy address and choose the client IP returned by middleware.GetClientIP.

This issue affects chi before 5.4.0.

## Affected packages

- `github.com/go-chi/chi/v5 <= 5.3.2`

## Remediation

Refer to the advisory for the patched release.