medium5.9
CVE-2026-67355
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 ho…
Impact
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.
Affected packages
| Ecosystem | Package | Affected | Fixed in |
|---|---|---|---|
| composer | guzzlehttp/guzzle | < 7.15.1 | 7.15.1 |
Weakness classification
References
- NVD record
- CVE.org record
- GitHub advisory
- https://github.com/advisories/GHSA-wm3w-8rrp-j577
- https://github.com/guzzle/guzzle/security/advisories/GHSA-wm3w-8rrp-j577
- https://github.com/guzzle/guzzle/pull/3901
- https://github.com/guzzle/guzzle/commit/7b68220d6543f6f80fe62e633361fc9d4ead14d4
- https://github.com/guzzle/guzzle/releases/tag/7.15.1
- https://nvd.nist.gov/vuln/detail/CVE-2026-67355
- https://www.vulncheck.com/advisories/guzzlehttp-guzzle-before-host-only-cookie-scope