---
id: GHSA-32rq-jhr7-m3hh
title: >-
  Duplicate Advisory: Guzzle: Proxy-Authorization headers can be sent to origin
  servers
summary: >-
  Duplicate Advisory: Guzzle: Proxy-Authorization headers can be sent to origin
  servers
severity: medium
cvss: 5.3
cwe:
  - CWE-200
vendor: guzzlehttp
product: guzzlehttp/guzzle
ecosystem: composer
affected:
  - guzzlehttp/guzzle < 7.14.2
published: '2026-08-01'
updated: '2026-08-04'
source: GHSA
sourceUrl: 'https://github.com/advisories/GHSA-32rq-jhr7-m3hh'
references:
  - url: 'https://github.com/guzzle/guzzle/security/advisories/GHSA-94pj-82f3-465w'
  - url: 'https://nvd.nist.gov/vuln/detail/CVE-2026-67339'
  - url: >-
      https://www.vulncheck.com/advisories/guzzlehttp-guzzle-before-proxy-authorization-header-disclosure
  - url: 'https://github.com/advisories/GHSA-32rq-jhr7-m3hh'
tags:
  - ghsa
  - composer
ingestedAt: '2026-08-05T05:58:04.897Z'
---

## Overview

## Duplicate Advisory

This advisory has been withdrawn because it is a duplicate of GHSA-94pj-82f3-465w. This link is maintained to preserve external references.

## Original Description

guzzlehttp/guzzle versions before 7.14.2 fail to properly isolate Proxy-Authorization headers from origin servers in cURL handlers. Attackers can capture proxy credentials through origin server access logs when requests are redirected, bypassed, or sent through SOCKS proxies that Guzzle misclassifies as direct connections.

## Affected packages

- `guzzlehttp/guzzle < 7.14.2`

## Remediation

Refer to the advisory for the patched release.