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Vulnerabilities CVE-2026-67355

CVE-2026-67355

High
Open
TLP:CLEAR

guzzlehttp/guzzle before 7.15.1 Host-only Cookie Scope

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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.

Details

CVSS Score
8.2
EPSS Score
0.23%

13.9th percentile

CVSS 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
Confidence
90%
Published
Aug 1, 2026
Last Modified
Aug 3, 2026
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