CVE-2026-67355 – guzzlehttp/guzzle before 7.15.1 Host-only Cookie Scope

CVE ID :CVE-2026-67355

Published : Aug. 1, 2026, 1:17 p.m. | 32 minutes ago

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.

Severity: 8.2 | HIGH

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