CVE-2026-67355

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.

CVSS v3 5.9 MEDIUM

5.9^/10

CVSS v3 : MEDIUM

Vector :

Exploitability : 2.2 / Impact : 3.6

Attack Vector NETWORK

Attack Complexity HIGH

Privileges Required NONE

User Interaction NONE

Confidentiality Impact HIGH

Integrity Impact NONE

Availability Impact NONE

Scope UNCHANGED

References

Link	Resource
https://github.com/guzzle/guzzle/security/advisories/GHSA-wm3w-8rrp-j577
https://www.vulncheck.com/advisories/guzzlehttp-guzzle-before-host-only-cookie-scope

Configurations

No configuration.

History

01 Aug 2026, 13:17

Type	Values Removed	Values Added
New CVE

Information

Published : 2026-08-01 13:17

Updated : 2026-08-01 13:17

NVD link : CVE-2026-67355

Mitre link : CVE-2026-67355

CVE.ORG link : CVE-2026-67355

JSON object : View

Products Affected

No product.

CWE

CWE-201

Insertion of Sensitive Information Into Sent Data

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