VDB
CVE-2026-67355
CVE-2026-67355
PUBLISHED
CVSS 8.2 HIGH
Reported by VulnCheck · Published August 1, 2026
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.
Risk Scores
CVSS 4.0
8.2
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
Affected Products
| Vendor | Product | Versions |
|---|---|---|
| guzzle | guzzle | 0, 7.15.1 |
| chainguard | nextcloud-server-32 | 0, 0, 0 |
| guzzle | guzzle | 7.15.1, 0, 7.15.1 |
| chainguard | nextcloud-server-31 | 0, 0, 0 |
| wolfi | nextcloud-server-33 | 0, 0, 0 |
| chainguard | drupal-11.3 | 0, 0, 0 |
| chainguard | nextcloud-server-33 | 0, 0, 0 |
| chainguard | privatebin | 0, 0, 0 |
| chainguard | nextcloud-server-34 | 0, 0, 0 |
| guzzlephp | guzzle | 0, 0 |
| wolfi | nextcloud-server-32 | 0, 0, 0 |
Timeline
- Jul 20, 2026 CVE Published
- Aug 1, 2026 Coalition ESS Score
- Aug 2, 2026 EPSS Score
- Aug 3, 2026 Security Advisory
- Aug 3, 2026 CVE Updated
- Aug 7, 2026 EPSS Score
- Aug 24, 2026 EPSS Score
- Sep 5, 2026 EPSS Score
- Sep 12, 2026 EPSS Score
References
- GitHub Security Advisory (GHSA-wm3w-8rrp-j577) vendor-advisory
- VulnCheck Advisory: guzzlehttp/guzzle before 7.15.1 Host-only Cookie Scope third-party-advisory