VULNERABILITY INTELLIGENCE
CVE-2026-67355
CVSS score8.2 HIGH
EPSS probability0.37%
CISA KEVNot currently listed
Published2026-08-01
Last modified2026-10-08
CVSS vectorCVSS:4.0/AV:N/AC:H/AT:P/PR:N/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N
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.
Weakness classification
- CWE-201: Insertion of Sensitive Information Into Sent Data