GHSA-mjrx-74jh-7xgw: Duplicate Advisory Guzzle: Host-only Cookie Scope Is Vulnerability

HIGH
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CVSS 5.9
CWE-201
Published
Advisory Summary

GHSA-mjrx-74jh-7xgw is a HIGH (CVSS 5.9) guzzle: host-only cookie scope is vulnerability (CWE-201: Insertion of Sensitive Information Into Sent Data) affecting Duplicate Advisory libraries in the Packagist ecosystem. The issue involves guzzle: host-only cookie scope is not preserved. Remediation is available in the latest vendor maintenance releases.

GHSA-mjrx-74jh-7xgw at a Glance

CVE Identifier N/A
GHSA Identifier GHSA-mjrx-74jh-7xgw
Severity HIGH
CVSS v3.1 Base Score 5.9
CWE Classification CWE-201: Insertion of Sensitive Information Into Sent Data
Affected Product Duplicate Advisory
Package Ecosystem Packagist
Published Date
Last Updated

Security Impact

CVSS: 5.9

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

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

How to Fix GHSA-mjrx-74jh-7xgw

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-mjrx-74jh-7xgw, 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-201: Insertion of Sensitive Information Into Sent Data, where the code transmits data to another actor, but a portion of the data includes sensitive information that should not be accessible to that actor. 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-wm3w-8rrp-j577. This link is maintained to preserve external references. ## Original Description guzzlehttp/guzzle versions before 7.15.1 fail to preserve host-only cookie scope, storing the request host in the Domain field instead of marking cookies as host-only. Attackers controlling child hosts can receive host-only cookies intended only for parent hosts, potentially disclosing session identifiers and authorization tokens when the same cookie jar is reused across trust boundaries.

GHSA-mjrx-74jh-7xgw 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-wm3w-8rrp-j577
NVD — GHSA-mjrx-74jh-7xgw NVD
https://nvd.nist.gov/vuln/detail/CVE-2026-67355
www.vulncheck.com/advisories/guzzleht... WEB
https://www.vulncheck.com/advisories/guzzlehttp-guzzle-before-host-only-cookie-scope

Frequently Asked Questions

What is GHSA-mjrx-74jh-7xgw?
GHSA-mjrx-74jh-7xgw is a security vulnerability in Duplicate Advisory involving Guzzle: Host-only cookie scope is not preserved under CWE-201: Insertion of Sensitive Information Into Sent Data.
Which Duplicate Advisory versions are affected?
Affected versions include releases prior to current release patches across affected packages: guzzlehttp/guzzle.
What version fixes GHSA-mjrx-74jh-7xgw?
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-mjrx-74jh-7xgw?
GHSA-mjrx-74jh-7xgw has a CVSS v3.1 base score of 5.9 (HIGH) with vector string CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:N.
What CWE is associated with GHSA-mjrx-74jh-7xgw?
GHSA-mjrx-74jh-7xgw is classified under CWE-201: Insertion of Sensitive Information Into Sent Data (The code transmits data to another actor, but a portion of the data includes sensitive information that should not be accessible to that actor.).
How can I check Packagist dependencies for GHSA-mjrx-74jh-7xgw?
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-mjrx-74jh-7xgw",
  "modified" : "2026-08-04T12:55:13Z",
  "published" : "2026-08-01T15:30:30Z",
  "withdrawn" : "2026-08-04T12:55:12Z",
  "aliases" : [ ],
  "summary" : "Duplicate Advisory: Guzzle: Host-only cookie scope is not preserved",
  "details" : "## Duplicate Advisory\n\nThis advisory has been withdrawn because it is a duplicate of GHSA-wm3w-8rrp-j577. This link is maintained to preserve external references.\n\n## Original Description\nguzzlehttp/guzzle versions before 7.15.1 fail to preserve host-only cookie scope, storing the request host in the Domain field instead of marking cookies as host-only. Attackers controlling child hosts can receive host-only cookies intended only for parent hosts, potentially disclosing session identifiers and authorization tokens when the same cookie jar is reused across trust boundaries.",
  "severity" : [ {
    "type" : "CVSS_V3",
    "score" : "CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:N"
  }, {
    "type" : "CVSS_V4",
    "score" : "CVSS:4.0/AV:N/AC:H/AT:P/PR:N/UI:N/VC:H/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" : "< 7.15.1"
    }
  } ],
  "references" : [ {
    "type" : "WEB",
    "url" : "https://github.com/guzzle/guzzle/security/advisories/GHSA-wm3w-8rrp-j577"
  }, {
    "type" : "ADVISORY",
    "url" : "https://nvd.nist.gov/vuln/detail/CVE-2026-67355"
  }, {
    "type" : "WEB",
    "url" : "https://www.vulncheck.com/advisories/guzzlehttp-guzzle-before-host-only-cookie-scope"
  } ],
  "database_specific" : {
    "cwe_ids" : [ "CWE-201" ],
    "severity" : "HIGH",
    "github_reviewed" : true,
    "github_reviewed_at" : "2026-08-04T12:55:12Z",
    "nvd_published_at" : "2026-08-01T13:17:06Z"
  }
}