CVE-2026-67355
guzzlehttp/guzzle before 7.15.1 Host-only Cookie Scope
- State
- Published
- Severity
- 8.2 High
- Published
- Aug 1, 2026
- Updated
- Oct 8, 2026
- Reserved
- Jul 29, 2026
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.
Scores
| CVSS | Score | Vector | Source |
|---|---|---|---|
| 4.0 | 8.2 High | 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 | VulnCheck |
| 3.1 | 5.9 Medium | CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:N | VulnCheck |
Weaknesses
- CWE-201 Insertion of Sensitive Information Into Sent Data
Affected Products
| Product | Versions |
|---|---|
guzzleguzzle |
|
References
- GitHub Security Advisory (GHSA-wm3w-8rrp-j577)vendor-advisory
- VulnCheck Advisory: guzzlehttp/guzzle before 7.15.1 Host-only Cookie Scopethird-party-advisory
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