CVE-2026-67355

guzzlehttp/guzzle before 7.15.1 Host-only Cookie Scope

Published Aug 1, 2026 CVSS 4.0 · 8.2 High EPSS < 1% KEV · Not listed
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.

Remediation

No solution or workaround provided in the CVE record

Tracking

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Advisories

Source ID Title
Github GHSA Github GHSA GHSA-wm3w-8rrp-j577 Guzzle: Host-only cookie scope is not preserved
History
Type Values Removed Values Added
Metrics ssvc

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

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'}

Weaknesses

Sources

Status
PUBLISHED
Assigner
VulnCheck
Published
Updated
Oct 8, 2026, 3:24 PM
Reserved
Jul 29, 2026, 1:36 PM
Status
Awaiting Analysis
Published
Aug 1, 2026, 1:17 PM
Modified
Oct 8, 2026, 4:17 PM