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.
Advisories
Source ID Title
Github GHSA Github GHSA GHSA-wm3w-8rrp-j577 Guzzle: Host-only cookie scope is not preserved
Fixes

Solution

No solution given by the vendor.


Workaround

No workaround given by the vendor.

History

Mon, 03 Aug 2026 20:30:00 +0000

Type Values Removed Values Added
Metrics ssvc

{'options': {'Automatable': 'no', 'Exploitation': 'none', 'Technical Impact': 'partial'}, 'version': '2.0.3'}


Sat, 01 Aug 2026 12:45:00 +0000

Type Values Removed Values Added
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.
Title guzzlehttp/guzzle before 7.15.1 Host-only Cookie Scope
First Time appeared Guzzlephp
Guzzlephp guzzle
Weaknesses CWE-201
CPEs cpe:2.3:a:guzzlephp:guzzle:*:*:*:*:*:*:*:*
Vendors & Products Guzzlephp
Guzzlephp guzzle
References
Metrics cvssV3_1

{'score': 5.9, 'vector': 'CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:N'}

cvssV4_0

{'score': 8.2, 'vector': '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'}


Projects

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cve-icon MITRE

Status: PUBLISHED

Assigner: VulnCheck

Published:

Updated: 2026-08-03T19:37:29.123Z

Reserved: 2026-07-29T13:36:36.278Z

Link: CVE-2026-67355

cve-icon Vulnrichment

Updated: 2026-08-03T19:37:23.975Z

cve-icon NVD

Status : Received

Published: 2026-08-01T13:17:06.283

Modified: 2026-08-03T20:17:27.700

Link: CVE-2026-67355

cve-icon Redhat

No data.

cve-icon OpenCVE Enrichment

Updated: 2026-08-02T03:15:03Z

Weaknesses