GHSA-32rq-jhr7-m3hh: Duplicate Advisory Guzzle: Proxy-Authorization Headers Can Be Vulnerability

MODERATE
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CVSS 5.3
CWE-200
Published
Advisory Summary

GHSA-32rq-jhr7-m3hh is a MODERATE (CVSS 5.3) guzzle: proxy-authorization headers can be vulnerability (CWE-200: Exposure of Sensitive Information to an Unauthorized Actor) affecting Duplicate Advisory libraries in the Packagist ecosystem. The issue involves guzzle: proxy-authorization headers can be sent to origin servers. Remediation is available in the latest vendor maintenance releases.

GHSA-32rq-jhr7-m3hh at a Glance

CVE Identifier N/A
GHSA Identifier GHSA-32rq-jhr7-m3hh
Severity MODERATE
CVSS v3.1 Base Score 5.3
CWE Classification CWE-200: Exposure of Sensitive Information to an Unauthorized Actor
Affected Product Duplicate Advisory
Package Ecosystem Packagist
Published Date
Last Updated

Security Impact

CVSS: 5.3

The security impact metrics below are parsed directly from the CVSS v3.1 vector string (CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N).

Attack Vector Network (AV:N)
Attack Complexity Low (AC:L)
Privileges Required None (PR:N)
User Interaction None (UI:N)
Scope Unchanged (S:U)
Confidentiality Low (C:L)
Integrity None (I:N)
Availability None (A:N)

How to Fix GHSA-32rq-jhr7-m3hh

To remediate this vulnerability, upgrade all affected Duplicate Advisory dependencies to a patched release. Both direct and transitive dependencies should be checked, as frameworks or security libraries may pull in vulnerable versions transitively.

guzzlehttp/guzzle fixed: Latest secure release 
Upgrade guzzlehttp/guzzle to Latest secure release
Verify Direct and Transitive Dependencies

Run the following command in your project directory to verify that all resolved dependencies use the patched release: 

inspect dependencies for guzzlehttp/guzzle

How to Check if You Are Affected

To determine whether your application is affected by GHSA-32rq-jhr7-m3hh, inspect your project dependencies for Duplicate Advisory:

inspect dependencies for guzzlehttp/guzzle

Analyze the terminal output to locate any version of Duplicate Advisory in your dependency tree. If any resolved version matches the vulnerable ranges listed in the table below (for example, versions earlier than the patched release), your application is affected.

Note: Verify declared build manifests and deployed runtime container environments.

Technical Details

Vulnerability Mechanism & Technical Analysis

This vulnerability is classified under CWE-200: Exposure of Sensitive Information to an Unauthorized Actor, where the product exposes sensitive information to an actor that is not explicitly authorized to have access to that information. In Duplicate Advisory, software state validation or input boundaries are circumvented during processing. Review the official source advisory statement below for specific affected components, classes, and reproduction details.

Source Advisory Statement

## 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.

GHSA-32rq-jhr7-m3hh Affected Duplicate Advisory Versions

1 component(s)
Product / Package Ecosystem Affected Versions Fixed Version
guzzlehttp/guzzle
 Packagist

References

GitHub Advisory / Wiki ADVISORY
https://github.com/guzzle/guzzle/security/advisories/GHSA-94pj-82f3-465w
NVD — GHSA-32rq-jhr7-m3hh NVD
https://nvd.nist.gov/vuln/detail/CVE-2026-67339
www.vulncheck.com/advisories/guzzleht... WEB
https://www.vulncheck.com/advisories/guzzlehttp-guzzle-before-proxy-authorization-header-disclosure

Frequently Asked Questions

What is GHSA-32rq-jhr7-m3hh?
GHSA-32rq-jhr7-m3hh is a security vulnerability in Duplicate Advisory involving Guzzle: Proxy-Authorization headers can be sent to origin servers under CWE-200: Exposure of Sensitive Information to an Unauthorized Actor.
Which Duplicate Advisory versions are affected?
Affected versions include releases prior to current release patches across affected packages: guzzlehttp/guzzle.
What version fixes GHSA-32rq-jhr7-m3hh?
Upgrading to current release patches (or the latest patched release for your respective branch) resolves the vulnerability.
Is guzzlehttp/guzzle affected?
Yes, guzzlehttp/guzzle is affected in releases prior to Latest secure release. Upgrade your dependency to Latest secure release or later.
What is the CVSS score of GHSA-32rq-jhr7-m3hh?
GHSA-32rq-jhr7-m3hh has a CVSS v3.1 base score of 5.3 (MODERATE) with vector string CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N.
What CWE is associated with GHSA-32rq-jhr7-m3hh?
GHSA-32rq-jhr7-m3hh is classified under CWE-200: Exposure of Sensitive Information to an Unauthorized Actor (The product exposes sensitive information to an actor that is not explicitly authorized to have access to that information.).
How can I check Packagist dependencies for GHSA-32rq-jhr7-m3hh?
Run the dependency tree command: 'inspect dependencies for guzzlehttp/guzzle'. This command lists direct and transitive dependencies in your build configuration so you can verify if a vulnerable version is resolved.
Machine-readable OSV JSON OSV v1.5 Schema
Normalized schema output
View Raw JSON 
{
  "schema_version" : "1.4.0",
  "id" : "GHSA-32rq-jhr7-m3hh",
  "modified" : "2026-08-04T12:49:43Z",
  "published" : "2026-08-01T15:30:29Z",
  "withdrawn" : "2026-08-04T12:49:04Z",
  "aliases" : [ ],
  "summary" : "Duplicate Advisory: Guzzle: Proxy-Authorization headers can be sent to origin servers",
  "details" : "## Duplicate Advisory\n\nThis advisory has been withdrawn because it is a duplicate of GHSA-94pj-82f3-465w. This link is maintained to preserve external references.\n\n## Original Description\n\nguzzlehttp/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.",
  "severity" : [ {
    "type" : "CVSS_V3",
    "score" : "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N"
  }, {
    "type" : "CVSS_V4",
    "score" : "CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X"
  } ],
  "affected" : [ {
    "package" : {
      "ecosystem" : "Packagist",
      "name" : "guzzlehttp/guzzle"
    },
    "ranges" : [ {
      "type" : "ECOSYSTEM",
      "events" : [ {
        "introduced" : "0"
      } ]
    } ],
    "database_specific" : {
      "last_known_affected_version_range" : "< 7.14.2"
    }
  } ],
  "references" : [ {
    "type" : "WEB",
    "url" : "https://github.com/guzzle/guzzle/security/advisories/GHSA-94pj-82f3-465w"
  }, {
    "type" : "ADVISORY",
    "url" : "https://nvd.nist.gov/vuln/detail/CVE-2026-67339"
  }, {
    "type" : "WEB",
    "url" : "https://www.vulncheck.com/advisories/guzzlehttp-guzzle-before-proxy-authorization-header-disclosure"
  } ],
  "database_specific" : {
    "cwe_ids" : [ "CWE-200" ],
    "severity" : "MODERATE",
    "github_reviewed" : true,
    "github_reviewed_at" : "2026-08-04T12:49:04Z",
    "nvd_published_at" : "2026-08-01T13:17:04Z"
  }
}