CVE-2026-67355

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.

CVSS Vector

References

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