github.com
https://github.com/guzzle/guzzle CVE-2026-67355
HIGH
guzzlehttp/guzzle before 7.15.1 Host-only Cookie Scope
Record summary
CVE-2026-67355 has a selected CVSS score of 8.2 (high).
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.
Description source: CVE List
Exploitation context
CISA SSVC decision
ExploitationNone
AutomatableNo
Technical impactPartial
CISA Coordinator · SSVC 2.0.3 · Evaluated Aug 3, 2026 · Source: CVE List
Affected products and versions
2| Product | Source | Version range | Status |
|---|---|---|---|
guzzleBrowse guzzle / guzzleDefault status: unaffected | CVE List | Before 7.15.1 | affected |
| 7.15.1 | unaffected | ||
guzzlehttp/guzzleBrowse Packagist / guzzlehttp/guzzle | GitHub Advisory | Before 7.15.1 · Fixed in 7.15.1 | affected |
References
7github.com
https://github.com/guzzle/guzzle/commit/7b68220d6543f6f80fe62e633361fc9d4ead14d4 github.com
https://github.com/guzzle/guzzle/pull/3901 github.com
https://github.com/guzzle/guzzle/releases/tag/7.15.1 GitHub Security Advisory (GHSA-wm3w-8rrp-j577)Vendor advisory
https://github.com/guzzle/guzzle/security/advisories/GHSA-wm3w-8rrp-j577 nvd.nist.gov
https://nvd.nist.gov/vuln/detail/CVE-2026-67355 VulnCheck Advisory: guzzlehttp/guzzle before 7.15.1 Host-only Cookie ScopeThird-party advisory
https://www.vulncheck.com/advisories/guzzlehttp-guzzle-before-host-only-cookie-scope